sw3 7o-BX-MMO-o1 0
Milito ry Operotor's Monuol Stoner SR-25 7.62mm Mork I
June 2000 (Rev. August 2005)
I Mod 0 Type Rifle Systems
(l(AC Port Number: 98169 NSN: 1005-01 -475-7980) ond other Mililory LightWeight Motch Models
?,//zro ?am {,c/e ea a, t/.e Ul'rc, , ,
Monuol is lnlended for Officiol Governmenl Use Only This
*/rl tk klzof arill dn. Knight's Armament Company 701 Columbia Blvd. Titusville, Florida 32780 Phone: (321) 607-9900 Fax (321) 268-1498
Table of Contents Paragraph
Number Chapter
l-l l-2 1-3 l-4 I -5 I-6 l-7 1-8 I-9 I - l0
1
Title
Page
Paragraph
Number
Number
- Introduction
Scope
1
Reportinglmprovements Nomenclature Cross Reference Destruction of Material NBC Ml6A2 Rifle Parts Commonality TechnicalSpecifications Facts About Your Sniper Rifle Tactical Flexibility Rates of Fire
I
I 2 2 2 3 11
l1 13
Chapter 2 - Operating Instructions 14 2-l Description 14 2-2 SR-25 System 15 2-3 Service Upon Receipt 16 2-4 Safety / Selector Lever 17 2-5 Charging Handle 18 2-6 Clearing Procedures 19 2-7 Field Stripping 2-8 Field Stripping Canier & Bolt 19 2-9 Detailed Field Stripping - Bolt 20
2-10 Detailed Field Stripping - Lower Receiver 2t
2-ll
The
Barrel
27
Page
Title
Number
2-12 Reassembly - Lower Receiver 2-13 Reassembly - Bolt & Carrier 2-14 Reassembly - Upper Receiver 2-15 Day Optic Mounting 2-16 Day Optic Removal 2-17 Magazine Disassembly 2-18 MagazineReassembly 2-19 Back-Up lron Sights 2-20 Sound Suppressor 2-21 Sling Swivel Stud 2-22 Preventive Maintenance Checks
27 28 30 30
and Services (PMCS) Safety / Trigger Function Check
42 45 46 48 56 58 59 60
2-23 2-24 Loading & Unloading 2-25 Day Optic Sight 2-26 Bipod 2-27 Extreme Cold Operation 2-28 Hot, Wet, Jungle Operation 2-29 Desert Climate Operation 2-30 After Fording Operation 2-31 Immediate Action Procedures 2-32 Remedial Action Procedures 2-33 Clearing Severe Double-Feed Jams
31
32 33 a1 JJ 35
4l
6l 6r 62 63
Chapter 3 - Maintenance Instructions Page
Paragraph
Number
Number
Title
64 3-1 Inspection Guide 65 3-2 Lubrication Guide 68 3-3 General 68 3-4 Trouble Shooting 73 3-5 Cleaning 3-6 Special Operator Maintenance 89 9l 3-7 Cleaning the Day Optic Sight 92 3-8 Cleaning Scope Mounts 92 3-9 Storage 93 3-10 Packaging for Shipment 93 3-11 Marking for Shipment
Chapter4-Ammunition Annex
A: References
Annex B: Description of Tool
94 95
Usage
Annex C: System Items for Your
Rifle
97 101
Annex D: Expendable Supplies & Materials 102 Annex E: Conosion Prevention
Program
105
1-1
CHAPTER1 INTRODUCTION SCOPE
This Commercial off-The-Shelf (COTS) manual is published for the purpose of providing a military style and folmat Operator's Manual for use by government authorized personnel issued the SR-25 Sniper Rifle Model Systems, lo lnclude the U. S. Navy's 7.62mm Mk 11 Mod 0 model. Most maintenance for the SR-25 Sniper Rifle System (SF-25) and/or Mk l l Mod 0 is Operator Level. Any deficiencies that may occur which the operator cannot correct, require that the complete weapon system be returned to the appropriate service repair activity for maintenance supporl. The user will nole however, that numerous parts and maintenance procedures are identicaliinterchangeable with many standardized U.S. Government supply and maintenance system components for the 5.56mm M1641iA2 Service Rifles. The return of U. S. Navy weapons will be coordinated by the POC in paragraph 1-2 below.
1-2
REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIOT{S
You can help improve this rifle sysbm. If you find any mistal€s or if you learn of any ways b improve this manual, please telephonefax or mail a letter direct to: KNIGHT'S MANUFACTURING COMPANY, 701 Columbia Blvd. Titusville, Florida 32780, Telephone: (321) 607-9900. Fax: (321) 268-1498. ote: U.S. Navy pensonnel will use the following point of oontact:
Naval Surface warfare Center (@de 4081),300 Highway 361, Crane IN 47522-5001 (attnr Mr, Terry O'Brian, Commercial T€lephone (812) 854-5831 or Fax (812) 854-1044'
1-3
NOMENCI-ATURE CROSS REFERENCE LIST: The below listed nomenclatures are to be considercd interchangeable wherever used throughout this manual:
common (us€d most often in this
manual)
screw Tube Round/Ammunition Gas Key Hard Case Oil Solvent Hoppe's, or Shooter's Choice Re@il Spring scope Rifle^Veapon Safety Allen Wrench //Allen Bufier
official Key, Socket Head Screw // Socket Head screw Lower Receiver Exbnsion Carbidge
Carrier Key Deployment Cas€ Lubrican$ CLP Bore Oeaner
Action Spring Day OptidPrimary Daytime optic Sniper Rifle/Sniper Rifle System
Safety Selecbr t€Yer '1
/ Set Screw
T.4
DESTRUCTION OF MATERIAL TO PREVENT ENEMY USE
Only your commanding officer can authorize the destruction of material to prevent enemy use. Refer to TM 750-244-7.
l-s
NUCLEA& BTOLOGTCAL AND CHEMTCAL (NBC) DECONTAMTNATION
General procedures can be found in FM 3-87 , FM 2L-40, and TM 3-220.
1.6
SR.25 PARTS COMMONALITY WITH STANDARD M16A2 RIFLE
Bolt Catch Plunger Bolt Catch Spring Buffer Detent Buffer Detent Spring Buttcap Buttstock Buttstock Screw Buttstock Spacer Carrier Key Carrier Key Screws (2) Detent, Safety Lever Detent, RearTake Down & Front (2) each
Plvot
Door Assy. Storage (4 pafts) Door Assy. Hinge Door Assy. Pin Dust Cover Spring Gas Tube Gas Tube Pin Hammer Pin Magazine Catch Magazine Catch Button Magazine Catch Spring Rifle Grip Rifle Grip Screw Rifle Grip Screw Washer
Rear Sling Swivel Rear Sling Swivel Screw Receiver Extension
'
Spring, Safety Lever Detent Spring, Take Down & Pivot Detent (2) Trigger Guard Assy (4 parts) Trigger Guard Hinge Pin Trigger Pin Windage Knob Windage Knob Pin Windage Knob Detent Windage Knob Spring
Note: some of the above listed pafts are common to the M4|M4A1 Carbines as well
2
SECTION
1-7
U:
EQUIPMENT DESCRIPTION
TECHNICAL SPECIFICATIONS FOR RIFLE SYSTEM WITH RAS FOREND:
Ammunition: 7.62mm (.308 Win.), M118
LR (combat use) and M852 Match.
Banel Rifling and Twist: 5 grooves, right-hand twist with 1 tum in 11 inches (279 mm).
Muzle Velocity: 2,571 fp6 (784 meters per se@nd) M118LR Ammuniuon
/
Barrel Length: 20" (508 mm).
Maximum Effective Range: 1,000 meters (M118LR velocity at 1,000 meters is 1,099 fps). Overall Length: 39.5' (1003 mm). Maximum Height V20-Rd. Magazine and Day Optic: 10.25" (260 mm). Rifle Weights unloaded: without sighb, adapters, or mounts: 10.44\b'€. (4.74 kg").
w/ Front & Rear Iron Sighb, Bipod Adapter: 10.78 lbs. (4.89 kg).
M Iron sights, Bipod Mapter,
Leupold 3.5 x 10 scope & SIMMD Mount: 12.83 lbs. (5.83 kg.).
Mk 11 Mod 0 Model: w/leupold 3.5 x 10 Scope & SIMMD Adapter, Bipod Adapter
wift
LM Type S Bipod: 13.7 lbs. (6.21 kg.).
Weight of 7.62mm KAC Sound Suppressor: 1.92 lbs, (,87 kg.) Weight of unloaded 20-Round Magazine: .46 lbs. (.21 kg.). Weight of Magazine loaded V2o-Rounds of Ml18 LR Ammunition: 1.62 lb6. (.73 kg.). Bipod LM Type S Weight: .87 lbs. (.39
k9.).
Weight of Bipod Adapter: .12 lbs. (.05 k9.).
Leupold 3.5 x 10 Scope and 30mm Ring Seh 1.66 lbs. (,75 kg.). Leupold 3.5 x 10 Scope,30mm Ring Set Scope Covers, and SIMMD Mount: 2.05 lbs. (.93 k9.). Day Optic Magnificauon: Variable Power 3.5 to 10 Power WM3 type Ballistic Cam. Rifle Deployment (Hard) Case, Redued Length: ,10" Long x 14" Wide x 10" Deep: Weight: 17 lb6. (7.71 kg.).
Special Military Light Weight Match "Free-Floating" Barrel RAS Rifle and IGC Sound Suppressor & Selected Optional Accessories
Figure 1-1 (Basic Rifle & Sound Suppressor)
4
Selected System Component Nomenclature
Leupold M3 Variable Scope Eyepiece Lens Cover
Objective Lens Cover
KAC Sound Suppressor
s
ii*"TxtE S{s
-4fi-
Flip-Up Front Sight
Flip-Up 600M Rear Sight
EX*
QD Sling Swivel
Case Deflector Bipod Adapter \\\iiHii li;.,::
1i
20-Round Steel Magazine
Bipod LM-S
suriL.::::t:::::=
Figure 1-2
Detailed Nomenclature (Right
/
Starboard Side)
Rail System Forend ;"itsiNN: stsiliMNR !
.W'
Scope Ring Base
Gas
1// Butt
cap Ejection Port Cover
Magazine Catch Button
Buttstock
Figure 1-3
6
QD Sling Swivel Stud
Detailed Nomenclature (Left
"1
/ Poft Side)
1-Rib" Handgu ard Panel
Charging Handle Latch
The "Crown" of the Barrel
\
Sound Suppressor Latch Grooves
Front
PirotPin/ Rear TakeDown Pin Safety Selector
Figure I-4
Typical Navy SR-25 System for "RIFLE7.62 MK 11 MOD 0" Stainless Steel One-Piece Bore Cleaninq Rod shown is no lonqer issued. t(+S\\::r.::r
iKYry****::** Bore Rod Guide
WW
:,Jr
irr re':\
SIMRAD Mount Adapter
ffiwj*
%
Operaton's Manual
Note: Navy system also includes Form Fitted Case as Illustrated in Figure
1-7" One-Piece Bore Rod currently issued is a black colored coated Dewey Rod.
Figure 1-5
I
Typical U. S. Army SR-25 SYstem
One-Piece Bore Cleaning Rod shown has been replaced with a Dewey coated rod.
Black Leather Sling
ffiffi 10-Round Magazine
Cleaning Kit
:*Wl'
Operator's Manual
Bore Rod Guide Figure 1-6
9
Other Optional System
Bore Rod Storage
Accessories Cleaning Kit Storage
Case, Form-Fitted ,/ for all Accessories and Extra Magazines \ (also part of Basic Navy Sys.)
Sound Su"ppreissor Storage
}W[\qa
Wj
..:Wffi
Figure 1-7 10
1-8
FACTS ABOUT YOUR SNIPER RIFI."E
The SR-25 Sniper Rifle S)€tem consists of an air cooled, precision made s€mi-automatic rifle, scope rings, optical sight, back-up iron sights, magazines, bipod; a form fitted foam lined rifle deployment case, a detachable sound suppressor, and an Operabfs Manual'
The rme may also be prc\iided with optional accessories that might include an adjustable sling, a deployment kit with spare parts, user cleaning and maintenance kit, drag bag, scope covers, scope lens @vers, and/or night smpes. The free-floating barrel sysbm of the SR-25 is one of the key contributors to its system accuracy. This simple design does not require application of glass bedding compound or barrel replacement operations by specially bained and equipped armoreF.
1-9
TACTICALFI"EXIBIUTY
The SR-25 will be used by expert class riflemen and trained snipers b engage and destroy enemy personnel at both long and short ranges. The trained sniper armed with the SR-25 and proper ammunition can consistently hit personnel size targets at ranges of 1,060 meters. the effeciive range obtained from other users will be dependent on their training, motivation and skill level. The SR-25 deliberately capitalizes on prior shooting and maintenance skills of indMduals trained and proficient but provides an inherenuy more robust and precision arm.
wi$
M16 type rifles,
The 7.62x51mm NATO caliber of tfie SR-25 and M118LR ammunitjon also pro/ides very accurab firing capability at e)(tended ranges. The SR-25 receiver and Rail Adapter S)Ftem (RAS) forend design permib the subsequent attachment and detadlment of other sighting rystems and accessories with appoved mounting systems without loss of combat zero. A complete kit of accessories can be provided for susbined deployment in remote areas. A variety of capabilities may be obtained by the combination of basic issue items and ancillary items like a drag bag, etc., can tien be tailored for a variety of tactical applications' These range from counter sniper actions conducted by local and federal level law enfor@ment agencies, to the mGt severe
operational environments which Fonvard Deployed and Specjal Operations furces may enmunter.
11
A sound suppressor is also available for approved agencjes, This cusbm designed suppressor attaches to the special gas block provision ttEt is part of each Specjal LW Matdl Stoner SR-25 Rifle. The combination of this mounting point and the suppressor design provides yet another aspect to the SR-25's unique flexibility and adaptability. This combination provides a level of accuracy, r€peatability and precision formally unavailable in a weapon of this type.
7.62mm l(AC Sound Suppressor mounted to the Special Military Light Weight Match "Free-Floating" RAS Rifl e
Figure 1-8
12
1-10
RATES OF FIRE
unnecessary rapidity or past the point- wherc the baneysound suppresso; can not be held comfortably in a bare hand because it is bo hot. Atthough the mechanism ibelf is capable of a very high rapid nh of fire, abuse of tfiis capability will lead to prematJre banel wear and lGs of matdl grade accuracy.
In training and peacetime, the rifle should never be fired wittl
MAXIMUM SUSIAINED RATE OF FIRE: Five rounds per minute for four minutes, two minute cooling (bolt open). After 100 prwide the best rounds, allovr, rifle to fully cool befor€ repeating. Oean bore during moling periods to increas€ barrel life and accuracl with subsequent shot groups.
TIbE 77tE
tE
1utuind Enhg
re@mnenM frrirg nE. In @nbt W nay fu rquitd b a(@ tn trning, Wu shwld nreb4f ever---aryr@dt the Maq:mum Susbitd
RaE is a Maximun Firing RaE, hJt not a
Maximum Susbined nae
n acontptlgt iour
iiol*.
RaE of Fire'
Maximum Sustained Firing Rate: 4 Minute Firing Cycles
After firing 100 Rounds in 28 Minutes Stop Firing. Allow banel to cool to touch. Clean and completely de-foul copper from bore.
Figure 1-9
13
CHAPTER SECTION
I:
2
OPERATING INSTRUCTIONS
DESCRIPTION
semi-automaticL.a[ Tfd rine equipped with DESCRIPTION: The SR-25 is a precision 7.62mm NATO, dir€ct-gas operated' t" n" eacti pull of ire rlgger as long as ammunition remains in magazine' a 2g-round magazine, one toaoeo, ii "t
2-1
iiii'iiffii
CAUTION
for positive firing sear control, do not load a round into the Although the sR-25 is provided with a manual safety lever system chamber until you are actually about to engage an authorized target' svstem(s), and optional items such as a sling, SR-25 $rSTEM: The basic system consists of the rifu, magazines, sighting ara6 oig G;ocat soft case). spare parts kit for rifle and or cleaning kit, minimum essential to"r.l'f,ft.l*rp"n*i -re, uip6o,
2-2
scope, and other
items.
NOTE
removed and replaced easily by the Approved scope, sighting devices and mounting systems can be in zero. It is recommended, user without the toss of more than I/2minute of angle (MoA) change to protect their mating surfaces' however, that the primary optr:calsight be left on tne ,ne in order SECTION
II:
SERVICE UPON RECEIPT
t, WARNING
Befo]€sta]tinganingp€ctionorperfominganymaintenance.Prccedurcs,peFonallyensu]ethe]if,eisclear.Never ttre chamber and see that it is empty ffir€ soue€ze the trigger untit you rrave-ci6rcJ'trt" iin"' Always check the bore' Ng"l1-?-'.:-?l!:Y.live amm$ition near iiJ in-*'r r"i ou"t-"ti.ns inNever trrv rr r:tJ! Pr.lrlll!, il'inTg-C;="1'"r""i. leave rifle or ammunition unattended' administrative, cleaning or maintenance aneas.
14
I
i
2-3
, I
a.
1
b.
] , ' , ' i I
Check sysblh case for signs of damage. Conduct safety check and inspect the equipment for damage that may have occured during shipment.
Inspect conhnts of rystem case (s) against the Shipping Documents and/or the rifle system parts list provided in Appendix C, Note that not all applicabie aaessories mJy have been shipped with your particular rifle. Check with your supervisor b veriry that the conEnts of your partiqllar shipment are conect and comdeF.
c.
Clear and field sbip rifle to ensure there are no missing parts (see paragraph 2-7 thru 2-10: Field stripping).
d.
Clean the rifle. Vr'hen finished, inspect bore for obstructions. Do not leave cleaning pabdles in tfie bore (see paragraph 2-11: Banel and 3-5: Cleaning). Inspect and Lubricate rifle per paragraph 3-1 and 3-2.
e.
Pertorm safev and tunctional checks (see paragraph 2-23: Safety/Functional Check).
f.
If not
attached, attach day optic to rifle and dleck eye r€lief with your sbck weld (see paragraph 2-15: Day Optic Mounting). Remount scope or adjust smpe's.position between the scope mounting rings if neessary. In @njunction with this procedurc, cieck for eyepiece focus 15se pEragraph 2-23).
Mo/e to a suitable firing range and dleck zero of rine and scope combination (se€ paragraph 2-25i DaY Optic Sight. Use this opportunity to a-djust the sling for your requirements and b bst fire all magazines induded with the rifle.
9. h.
i.
I
SERVICE UPON RECEIPT
Oean and inspect rifle in accordance with paragraph 3-5: Cleaning and Inspection, The rifle is readv for seMce.
j.
ff any deficiencies or discrepancies are found. you may contact: KNIGHTS MANUFACTURING COMPANY, 701 Columbia Blvd' Titusville, Florida 32780, Teiephone: (321) 607-9900, Fax: (321) 268-1498. Note: U.S. Navy personnel wi! use,t!9 following point of contactt itaval Surface Wafare Center (Code 4081)' 3O0 Highway 351, Crane IN 47522'5001 (attn: Mr. Terry O'Brian, commercial Telephone (812) 854-5831 or Fax (812) 854-1044.
I
i
15
SECTION
2-4
UI:
OPERATION AND CHARACTERISTICS
SAFETY SELECTOR LEVER (the Sa6ety)
a.
The safety is located on the left rear side of tfie lo,ver reeiver. The safiety has two positions: SAFE and FIRE are both dearly marted on the lower receiver. When the safety is rotabd to the SAFE position, the rne (hammeD is fully cocked, but the firing sear is blod€d ftom movement providing protection from accidental disdarge under normal usage when the safety is prcperly engaged and serviceable.
b.
To rotab the safety to he SAFE position, pull the charging handle fully to the rmr while visually checking that the chamber is dear by observing througi the ejection port as he bolt is reuacted by the charging handle. The safety may be rotaH b the SAFE position any time the bolt is held fully b fte rear or when the bolt is forward and the hammer is cocked.
o
FIRE
Figure 2-1
16
WARNING The rifle may fire any time the safety is in the FIRE position and the trigger is pulled' When you are not actually firing your rifle, always rctate the safety to the SAFE position. REMEMBER:
Simply removing the magazine does not Safe or Clear a weapon'
c. d.
Keep the safety in the SAFE position while handling, loading, or unloading the rifle.
When you are ready to fire, confirm your target, rotate the safety to the FIRE position, and squeeze the trigger' IYOTE Before clearing the n'fle, pla@ safety on
l 1
gFE
and remove the magazine.
2.5 CHARGING HANDLE of cocking the bolt and either a. The charging handle is located at the rear of the upper receiver and is the primary means position loading or unloading
tie chamber. It
has a spring loaded catch which retains it in its fon rard
during firing.
l
b.
To operate the charging handle, depress the catch while pulling the handle to the rear. When the bolt is fully to the rear, the handle will come to a stop. Note that the ejection port cover snaps open as tie bolt passes. This allows the chamber to be inspected.
17
2-G a,
CLEARING PROCEDURES (see photographs on follow-on pages)
Point rifle in safe direction and rotate safety to SAFE position.
WARNING
If the safety will not go to SAFE position, pedorm the following steps with extreme care.
b.
Remove magazine by depressing catch button and pulling magazine down.
Pull the charging handle fully to the rear while visually checking that the chamber is clear by observing through the ejection port as the bolt is retracted.
c.
To lock the bolt open, pull charging handle fully to the rear. Press bottom portion of bolt catch and hold. Allow bolt to move forward slightly by slowly releasing charging handle. The bolt should engage the cakh lug (this can be observed through the ejection port). Return charging handle fully forward. Rotate safety to SAFE.
d.
e. check interior of receiver area and chamber ensuring these areas are clear of ammo. With the safety pointing to SAFE, allow the bolt to 90 fully fon,ard by pressing the upper (larger) portion of the bolt catch. The bolt should spring home (forward). Close the ejection port cover.
f.
IYOTE is good opentional practice to keep the ejection poft dust covet cl6ed at all times. It oryns automatially each time the bott is putted to the reat or when a round is fited. HowetEr, it will remain in the open position unless This pnctice witl help keep the dfle clean and functional, especblly under adveBe wea Er manuatty close
It
W
it
mndMons.
1B
2-7
FIELD STRIPPING -- UPPER RECEIVER (see photographs on follow-on pages)
WARNING
Rifle must be unloaded, magazine removed, clear and on SAFE before Field Stripping and removing bolt.
Depress the magazine release button and remove magazine. Pull charging handle to the rear, check that the receiver and chamber are clear. Ease the charging handle forward (bolt should spring home under tension from the action/recoil spring). Close dust cover.
a.
While squeezing the upper and lower receivers together, push left end of rear takedown pin into lower receiver. From the right side of the receiver, pull the pin until it stops against its internal detent.
b.
c.
Hold the upper receiver horizontal and pull charging handle about three inches to the rear.
Withdraw bolt carrier to the rear and out of the upper receiver. Note that the dust cover being closed helps prevent the bolt from falling out prematurely.
d.
e.
Remove charging handle by pulling to the rear and allowing it to pass through its disassembly slots in the upper receiver.
While squeezing the upper and lower receivers together, push left end of front pivot pin into lower receiver. From the right side of the receiver, pull the pin until it stops against its internal detent.
f.
Separate upper and lower receivers. No other field stripping of the upper receiver is required for normal cleaning' However, optical sight may be removed if desired, See paragraph 3-6 for handguard removal.
g.
2-8
FIELD STRIPPING -- CARRIER AND BOLT (see photograPhs on follow-on pages)
Hold carrier with bolt pointed downwards. Pull or push firing pin retaining pin from its recess, noE it does not come free of the carrier like M16 rifle's. The SR-25's firing pin retainer is held captive by a pin so it wont be lost during cleaning.
a.
Cover open end of carrier with the palm of a hand and point bolt upwards. Allow firing pin to drop into palm. Avoid dropping firing pin onto a hard surface. Set flring pin aside in a safe place.
b.
19
push bolt assembly into the carrier to iB locked position. Withdraw cam pin clear of bolt carrier. Set cam pin aside with firing pin in a safe place.
c.
CAUTION
Do not lose rifle parts that you set aside. They are essential for safe operation. Do not remove firing pin retaining pin from. carrier assembly.
d.
Remove bolt by pulling it from the carrier.
2-9
DETAILED FIELD STRIPPING
-
BOLT (s€€ photographs on
follow-on Pages)
Extractor may be removed from bolt by pressing the rear of the exbactor against bolt and using the firing pin to slighuy press out the pivot pin.
a.
b.
Using your fingers, withdraw ext€ctor pivot
pin. Set extractor and extractor pin aside with cam pin and firing pin. CAUTION
With the extractor removed from the bolt, it is easy to lose the extractor pin, or the small silicone buffer that fits inside the coils of the extractor spring during cleaning if you do not place them aside in a safe place. Be careful not to lose any parts, wrap them in a rag and place them in your pocket. Do not damage tip of firing pin when pressing out pins. Do not remove extractor spring from extractor body-if you do, have an Armorer re-assemble.
C.
No other field stripping of the bolt and carrier is required.
20
i
2-LO DETAILED FIELD STRIPPING
r
a.
i
Slowly ease buffer and action spring from lower receiver extension (buffer tube) while holding hammer out ofthe way. Separate the action/recoil spring from buffer.
I
-
LOWER RECEIVER (SCE PhOtOgTAPhS ON fOIIOW-ON PAgES)
Cock hammer and press in buffer (note that it is strongly spring loaded), depress buffer retainer detent.
b.
No otfier fleld stripping of the rifle or rifle assemblies is required'
21
Field Stripping Procedures
2-7 a. Release Magazine and Clear Weapon
2-7 d. Withdraw Bolt Carrier Assembly
2-7 b. Pull Rear Takedown Pin
2-7 c. Slightly Retract Charging Handle
2-7 e. Remove Charging Handle 2-7
f
.
Pull Front Pivot Pin
Field Stripping Procedures (Continued)
s"
s
*-@
*;lj1 ir'2-7 g. Separate Upper and Lower Receivers
2-B a. Pull Firing Pin Retainer Pin
2-8 b. Tilt Bolt Up and Catch Firing Pin in Hand
ry
I ffit ::.:::::::::: :ll:
&
9t l
I Wi
2-B d. Remove Bolt Assembly
2-8 c. Withdraw Cam Pin 23
Detailed Field Stripping Procedures
i\i\r:::::x:::-
l
NitllMu=
2-9 b. Withdraw Extractor Pivot Pin and Remove Extractor
2-9 a. Push Out Extractor Pivot Pin Slightly with Firing Pin
2-9 c. Extractor, Pivot Pin, and Bolt ready for Cleaning, Inspection, or Lubrication
2-10 a. Depress Buffer Detent while preventing Buffer from flying-out under spring pressure with your Thumb
24
2-10 b. Remove Buffer and Action Spring and separate them for Cleaning, lnspection, or Lubrication
Weapon Completely Field Stripped for Cleaning, Inspection, or Lubrication Action and Recoil Spring
Buffer
Lower Receiver Group
Upper Receiver Group
Charging Handle
"{..ftl,il$
w
Extractor Assembly
$ Extractor Pivot Bolt Carrier Assembly
,$*
M
rs&.
ffi
ffi Cam Pin
Firing Pin
Figure 2-2 25
Pin
Bolt & Carrier Assembly Field Stripped for Cleaning, Inspection, or Lubrication
Extraclor Assembly |
;,;,
Bolt Assembly ,"n:$'$ N:I NI
/
Note 3 Gas Rings with their Gaps Staggered
Extractor Fivot Pin
Carrier Gas Key
Firing Pin Retaining Pin
r.\I"{Tii
l$
Firing Pin itiiir'itlillr,l- :j.ri ,,
-,,*..**,r1.i
Figure 2-3
26
Cam Pin
2-11 THE BARREL The barrel is the heart of your rifle's accuracy and precision. Take very good care of the barrel and upper receiver group. Be especially careful when it is detached from the rifle during field striPping.
a.
(1) (2) (3)
\ '
To check the inside of the barrel: Perform clearing procedures (see paragraph 2-6). Remove bolt assembly (see paagaph 2-7).
Look through the bore from the chamber end to the muzzle. includes the chamber area and bolt locking recesses.
It should
be clean and free of obstructions. This
l
(4)
To remove obstructions, debris, or excess lubricants, use the Bore Rod Guide and cleaning rod with a patch. Insert ti5e rod through the Bore Rod Guide, into the chamber, and all the way through the bore until the rod tip/patch clears the
muzle.
(5)
i r ' ,
clean the barrel (see para 3-5:cleaning).
2-12
REASSEMBLY--LOWER RECEIVER
a. b.
Assemble action spring and buffer.
Make sure hammer is cocked. Insert action spring and buffer into lower receiver extension. Buffer retainer may need to be depressed as buffer is fully inserted.
l
27
2-13
REASSEMBLY--BOLT AND CARRIER
Ensure extractor spring and silicone buffer are properly seat€d (the point of a bullet may be used to re-seat exbactor spring by giving it a slight twist). Hold extractor assembly in place on bolt and insert extractor pivot Pin. Check orientation of gas ring slots on bolt assembly. They should be staggered at 12, 4, and 8 o'clock positions.
a.
Insert bolt in carrier. Rotate bolt to align cam pin hole at rear of cam slot of carrier. Ensure exbactor is orientated to the right (ejection port side).
b. c.
Ins€rt cam pin with firing pin hole aligned front to rear.
WARNING Cam pin must be installed in bolt group; if not, rifle can still fire and
will explode'
Remember to lnstall Cam Pin
28
d.
HOLD FIRING PIN RETAINING PIN TO ITS FULL OPEN STOP. Hold bolt downwards in palm of hand and drop firing pin into carrier. With a section of cleaning rod, push firing pin to its full forward position (only about 1/8" of the firing pin head is visible when fully forward). See illustration on this page. With firing pin fully forward, push in on retaining pin. Retaining pin should be flush or below the surface of the carrier body.
Retaining Pin must pass between the Firing Pin's Head and large firing pin bearing
Proper Assembly of Firing Pin ond insertion of Firing Pin Retqining Pin
Figure 2-4
View Firing Pin Heod lhrough Hommer Slot in Boll Corrier
Firing Pin Heod Large Bearing
Boll
Corrier
e.
pull boll to its extended (unlocked) position. Hold rear of carrier down against open palm and shake carrier. Fking pin shoutd not fall out if retaining pin and firi;d pin are properly installed (you should also be able to hear liring pin moving back and forth).
2.14
REASSEMBLY.-UPPER RECEN'ER
a.
With sights down. insert charging handle into upper rec€iver. Ensure charging handle lugs enter their grooves in the rear of upper receiver through the clearance slots near the rear of the upper re@iver. Position charging handle three inches from its full forward position.
b.
Insert bolt and carrier group carefully into upper receiver. Push foruard on carrier until bolt and charging handle are fully
foMard.
Close dust cover.
c.
Make sure hammer is cocked and safety is on SAFE. Ass€mble upper and lower receivers so that the pivot pin holes are aligned. Push in pivot pin.
d.
Hold upper and lower receivers together push in rear takedown
2-15
DAY OPnC MOUNTING
-
pin. REASSEMBLY is now complete.
(As required)
a.
Before mounting day optic, lubricate the threads of each mounting nut with one drop of oil' Rotate mounting nuts to evenly distribute lubricant. Ldave nuts fully loosened (turned counter-clockwise) on their shafb until the bases are seated on the receiver rail.
b.
Inspect each mounting ring nut and mount claw for burrs and debris. Remove any debris before mounting sighting s,ystems. Make sure receiver dovetail is also free of debris and burrs. See armorer to remove burrs.
c.
Mount day optic sight and scope rings to the upper re@iver dovetail with rifle held horizontally and ejection port up. Hook flxed chwi of sighthounts under right side of receiver dovetail and rotate scope ring bolt shafts down into the selected dovetail slots. Continuc holding oPtic against rcceiver dovetail dudng the following steps.
NO|E mere are sevenl pairs of mounting slog tu accommodae eye relief and scope ring location. Once you chos a pair, they shoutd be used again to rebin zero if the sight tb subsequendy rcmotEd and then reathched. 30
d.
Slide the rear mount claw under and against the receiver dovetail. Finger tighten the mounting ring to turn to the righvclockwise direction.
nut. Tighten means
Slide the front claw under/against the dovetail and finger tighten mounting nut.
CAUTION
Steps f. and 9. should be performed only when the day optic is attached witiout benefit of the T-Handle Torque Wrench and re-zeroing of the system cannot be accomplished through live firing. Otherwise use T-Handle Torque Wrench as described in steps h. through j.
f. g. h. i. j.
Use the 1/2" combination wrench (or plastic T-Wrench from Cleaning Kit) to tighten the rear mounting ring nut 1/4 turn. Use the 1/2" combination wrench (or plastic T-Wrench from Cleaning Kit) to tighten the front mounting ring nut 1/4 tum.
With the T-Handle torque wrench pre-set to 65 in. lb., tighten the rear mounting ring nut until torque wrench clicks. With the T-Handle torque wrench pre-set to 65 in. lb., tighten the front mounting ring nut until torque wrench clicks.
After an initial ten rounds have been fired. re-torque/check tighhess of the mounting ring nuts. Do not over-tighten mounting ring nuts.
2-16
DAY OPTIC REMOVAL
a.
Use the 1/2" combination wrench to loosen the front and then the rear mounting ring nuts while holding optic firmly against receiver dovetail. Never use torque wrench to loosen. Loosening means to rotate to the lefl/counterclockwise direction.
b.
Holding left side of rifle down, mtate scope away from the nuts to'disengage from receiver dovetail. Note should not rotate completely off the shaft.
31
tiat
nuts
2-17 MAGAZINE DISASSEMBLY
a. b.
Unload magazine carefully. Do not b€nd, deform, or gouge feed lips while unloading (stripping rounds from magazine).
Turn magazine base plate up. Push up on rear of base plate with one thumb while covering the bottom of the magazine with the other hand in order to cakh the spring as you slide base to the rear and free of magazine body. Note, the base is under spring tension.
\.
)
-r
\",
/ i
...J
\r J
?
-*d*_d
Figure
2-5 Removing
?
Magazine Base
c.
Jiggle spring while pulling gently to separate from magazine body as shown in Figure 2-6. Note magazine follower and spring are attached. Do not separate the follower from the spring.
Figure
32
2-5 Magazine Disassembled
2-18 MAGAZINE REASSEMBLY
a.
Before reassembly, clean all foreign matter from magazine components. The magazine spring should be lighuy lubricated with a cleaning patch wetted with 2-3 drops of oil. NOTE The magazine follourer must be odentabd as
i ustahd in Fgure
2-5.
b.
Orientate follower and spring to magazine body and carefully insert through bottom of magazine body, Jiggle spring while pushing gently until follower is seated under feed llps. Push the remainder ofthe spring into the magazine. Hold spring under tabs wiffl thumb pressure.
c.
Orientate base so its raised central surface is on th€ outside. Slide base under rear tabs, and continue sliding base under front tabs until tie rear of the base cakhes on magazine body.
2-I9
BACK-UP IRON SIGHTS
a.
Loosen retention screws of back-up iron siEhts 4-5 turns (it is not necessary to remove them) and lift away from receiver rail or mountjng surface.
b.
(Note tfie rear iron sight's retention screw normally lays in the third rearward slot on the receiver rail.) With scope removed and mounting rails clean, mount back-up iron sights by engaging the right side of rail with right claws of the bases. Then rotate iron sight base down against receiver rail.
c.
Hold assembly in place with thumb, and tighten retention screws firmly. Do not over tighten retention screws with tools. Removal is the opposite of installabon.
33
Figure
2-6 Installation of Back-Up Front Sight
Figure
2-7 Installation of Back-Up
Use 5/64" Allen Wrench from Cleaning Kit to rotate and adjust Front Sight Post duringZeroing Procedures.
lurn of the post moves the strike of the bullet 318" al25 meters or 1.5" at 100 meters.
Vq
34
Rear Sight
2-20 SR-25 MODEL QD (QUICK-DETACH) SOUND SUPPRESSOR (KAC P/N: 98440) (ror with Quick.Detach Suppressor Slots Machined in
sR-2s sniper Rifles
Gas Block)
a. INTRODUCTION. The SR-25 Model QD Sound Suppressor interfaces with two venical slots cut into the SR-25 barrel, just forward of the gas bloclvfront sight base, at the three and nine o'clock positions. There is also an alignment pin on the banel at the six o'clock position that prevents imprcper installation of the suppressor. The SR-25 Model QD is not compatible with SR-25 sniper rifles which ar€ not equipped with the two slots and the alignment pin featlrre. The Model QD sound suppressor weighs approximately one and a halfpounds and significantly decreases the sound level and recoil of the weapon on which it is installed. The QD suppressor is constructed of stainless steel and is coated with a black colored moly resin.
Before attempting to install or use the QD suppressor, familiarize yourself with all instructions, WARNINGS, CAUTIONS, NOTES, and maintenance guidelines contained in this manual.
WARNING The QD suppressor was designed to be as effective and light weight as possible. The trade-off is that it gets hot very quickly, Except in emergencies, liring duration (number of rounds fired before cooling) should be limited to increase the lifespan ofthe suppressor. Never subject the Model QD suppressor to mo.€ than 20 rounds of sustained fire (five rounds per minute for four minutes). ff this limit is reached, allow the unit to cool to ambient temperature before resuming fire. To precisely maintair the point of impact, the suppressor should be allowed lo cool to ambient temperature every l0 rounds. SPECIFICATIONS:
Length: 12.25 inches. Diameter: 1 3/8 inches.
Weight: 1.87 pounds (average) Construction: Stainless Steel. Type: Baffle. Sound Suppression: 30 dB drop (average)
35
b. INSTALLATION / REMOVAL OF THE QD (QUICK DETACH) SOUND SUPPRESSOR. TNSTALLATION:
1.
Remove the magazine. Draw the bolvcanier assembly to the rear and visually inspect the chamber and receiver. Close the bolvcarrier assembly, confirm that the selector is set to "SAFE," and close the dust cover.
COMIRM THE SR-25 SNIPER RIFI-E IS UNLOADED AND ON SAFE.
a'
il-
il-t1
i1 i1
ir\,
Figure 2-8 36
I 1
)
2.
FROM THE REAR OF THE RIFLE (muzzle pointed away from you), Iaise the quick-detach locking latch on the QD suppressor and slide the suppressor over the banel. Rotate the QD suppressor counter-clockwise (looking from the rear) until it engages its rotational stop (alignment pin) in the banel.
3.
While holding the suppressor flrmly to the rear and against its rotational stop in the barrel, lower the quick-detach locking latch on the QD suppressor until fully engaged (flush with the top of the suPpressor.
WARNING The model QD suppressor !!!9! designed to be used "wet." Under no circumstances should it b€ tilled with grease or any other ,'artificial environment,' before use ( as is often the procedure with suppressed weapons using low velocity pistol ammunition). The use of an "artificial environrnent" could alter the path of the projectile and/or foul the gas system and moving parts ofthe
rifle.
REMOVAL: CAUTION After use, the QD suppressor will be extremely hot. Protect your hands with leather/ heat resistant gloves when removing hot suppressors.
I.
CONFIRM THE RIFLE IS UNLOADED AND ON SATD AND STAY BEHIND THE WEAPON (MUZZIC POiNtCd AWAY fTOM you). Aft€r use, the QD suppressor will be extremely hot. To remove the QD suppressor while hot, use a bayonet or other available tool to disengage (raise) the QD locking latch.
2.
With muzzl€ pointed away from you, rotate the suppressor clockwise and slide the suppressor sfaight off the barrel-
WARNING Except in emergencies, Iiring duration (number of rounds fired before cooling) should be limited to increase the lifespan of the ,upp""."or. Nelver subject the Model QD suppressor to more than 20 rounds of sustained fire (five rounds per minute for four min;tes). If this limit ii reached, allow the unit to cool to ambient tempemture before resuming lire. To precisely maintain the point of impact, the suppressor should be allowed to cool to ambient temperature eYery l0 rounds.
37
C. SR-25 MODEL QD (QUICK-DETACH) SOUND SUPPRESSOR MAINTENANCD.
IMPORTANT OPERATOR CLEANING NOTE The SR-25 Model QD (Quick-Detach) sound suppressor should he removedfrom its host weapon as soon as possible afiet ewry use. The QD suppressor should. be remoted while it is hot because corhonfouling solidifes as the unit cools, making it more difficuk to remove later. the weaponlsupprcssor combination is to be repeatedlt used oyer a period of time, it is useful to remove the suppressot temporaril! therebJ minimizing the buildup of metal and carbon foulinS.
If
OPERATOR CLEANING. The SR-25 banel and the Model QD (Quick-Detach) sound suppressor should be cleaned with the following procedue after every use:
1,
Dismount the suppressor from the weapon.
2.
Dry brush carbon fouled parts using the general purpose (GP) toothbrush from the weapon cleaning kit. Take care to orientate the parts so carbon does not fall into the weapon bore, the handguard tube, or down into the suppressor body.
3,
CLP and a rag should be used to remove remaining carbon fouling fiom the barrel surfaces which contact the suppressor.
4.
Do not use wire brushes. If carbon fouling remains, use the nylon bristles of the GP tooth brush and CLP to scrub pans clean. Remounting and dismounting the suppressor (with the muzzle pointed down) once wet with CLP may also help remove residue. NOTE
Do not allow CLP or cleaning solvent to flow do\en into the QD suppressor body. Oientate the suppressot "muzzle up" when brushing with the GP toothbrush or when soaking the locking latch contact area at the rcar of the suppressor hod!.
5.
The user should final clean and dry the CLP from affected parts with an absorbent cloth.
6.
When used with a suppressor, the SR-25 Rifle requires a thorough cleaning after every use. The rifle's bolt carrier assembly' in particular, is heavily fouled by the addition of a suppressor to the syst€m, and therefore reqrires more frequent cleaning than is necessary under normal liring conditions,
7.
If the SR-25 bdrel
and suppressor are exposed to salt water, mud, or corrosive chemicals, the QD suppressor should be rcmoved from the host weapon and the assembly should be thoroughly rinsed with fresh water and completely dried intemally using compressed air or an oven (at 250'0.
38
]
suppressor body, wipe it dry with a clean cloth. Apply only a light coat of CLP to the latch contact ar.ea of the barrel to prevent corosion each time the weapon is cleaned. A very light coat of CLP should be applied to the suppressor latch componenls lo smooth lJleir operalion.
d. LUBRICATION. Do not oil the QD
CAUTION Do not allow CLP to flow down into the supprcssor body and contaminate the intemal baffle arcas. CLP and other oily residues will cause excessive smoke when the suppressed rifle is fircd.
If the user suspects that CLP or copper cleaner
has entered the suppressor, the suppressor should be thoroughly soaked and agitated
vigorously in warm soapy water, and then rinsed in clear fresh water and allowed to air dry.
CAI-ITION The interior of the QD suppressor must be thoroughly dry before using. The use of compressed air, an electric fan, or even an oven set on low heat (25dr D is recommended if available. Any solvent or other cleanidg agent remaining in the suppressor could alter the path of the projectile and/or foul the gas system and moving parts ofthe rifle.
39
suppressor may mcasionally (every 500 rounds) rcquire an armorer to soak the suppressor body in oil-free cleaning solvent to remove powder residue or un-bumed granules which are noted by the user as degrading sound or flash suppressing
e, ARMORER CLEANING, The QD perfomance.
1.
Oil-free cleaning solvent should be used to remove carbon fouling and un-bumt propellant $anules from the QD suppressor by ovemight soaking.
NOTE
If Dry Cleaning Solvent, (81348) A-A-711,
I
Gal. Can, NSN: 6850-00-281-1985 is used,follow normal precautions, insure qdequate ,rentilation, weat tubher gloves, etc.
2.
After soaking ovemight in a closed solvent container, use hot, soapy, water to wash remaining chemicals ftom the intemal voids of the suppressor. Use fresh hot water to thoroughly rinse and final clean the QD suppressor.
3.
The QD suppressor must be thoroughly dried intemally using compressed air, or an oven set on low heat.
CAUTION Any solvent or other cleaning agent remaining in the suppressor could alt€r the path of the projectile and/or foul the gas system and moving parts of the rifle/carbine.
4.
The armorer should perform operator maintenance on the QD suppressor and lightly lubricate the latch components before retuming to service and/or while it is stored in the atmory.
40
it
2-21 Installation of SIing Swivel Stud Assemblies to 'Free-Floating" Rail Adapter System (RAS) Forend
ig
\\
i.
Stud and Nut Assy.
a.
b.
Slide nut into channel. :
c.
d.
Screw stud into nut.
Figure 2-9 41
Slide nut to desired hole.
\i':.\.:
..:..:::::.::.:]:a::.:.
]1.
.
Tighten with allen wrench.
SECTION
IV:
PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS)
GENERAL
WARNING Before stafting PMCS, clear the rifle. Inspect the chamber, receiver areas, and magazines to ensure they are empty. Do not allow live ammunition near work or maintenance areas.
If your equipment fails PMCS, r€fer to trcuble shooting prooedurcs in Chapter 3.
2-22
PMCS PROCEDURES
PMCS lists tho6e required checks and services
to be performed ry operator personnel assigned the SR-25 Sniper Rifle System before.
during and after use.
a. b. c.
Befurc Operation. Peform your Before (B)
PMCS as a brief s€rviae ensuring the SR-25 is ready
for operation.
During operation. As required/same as for Before Operation.
After Operation. Perform your After (A)
and corrected so the SR-25 will be ready
b
PMCS as a conective service ensuring
that all operational deficiencies are identified
operaE when needed.
d.
twt Redy/Available If &lamn. Ihe PMG bble lisE the ddciaris whidt caue tle SR-25 Snipr Rr:ne Syspn tWt Readl/Availabb. If tlw defrciencis are not enectable, sud| defrcienci* will tquire an Arn orer u ewataticn b the next hidlrer drebl d ntain@nan@.
42
2-22
PREVENTTVE MATNTENANCE CHECKS AND SERVICES (PMCS) TABLE
B=Before
Item #
Interval
Operation
D=During
Operation
Equipment is NOT READY/AUAILABLE TF:
ITEM TO BE INSPECTED. Procedure
B
I
*
D
A
*
EQUIPMENT. Check the Sniper Weapon System Pafts
Major
(see Appendix C). 2
*
*
RIFLE. Visually inspect the entire rifle for damaged or missing rifle components (see Figure 1-1).
*
3
4
*
*
CLEAN the rifle and day optic sight per cleaning instructions (see para 3-5 and 3-7).
*
6
*
* *
p
atb or componenE a re missing.
ff components are damaged or missing. ff rifle or componenE are dirty.
ACTUATE SAFETY. (Rifle must be cocked, see instructions in para 2-4)
ff hammer will not stay
a.
ff hammer falls.
Rotate safety'to SAFE position, squeeze trigger.
b.
5
A=After Operation
cocked.
Rotate safety to the FIRE position, squeeze trigger. Hammer should fall (you should hear the hammer fall).
ff hammer
BOLT OPERATION. Grasp charging handle and pull bolt fully to the rear, Operation should be smooth.
ff operation is notsmooth,
BOLT CATCH. While holding bolt to the rear, depress lower end of bolt catch. Return charging handle fully forward. Bolt should be retained to the rear by the bolt catch.
ff bolt is not held to the rear
43
does not fall forward'
by the bolt catch.
PREVENTTVE MATNTENANCE CHECKS AND SERVTCES (PMCS) TABLE
B=Before Operation
Item #
Interval
Equipment it NOT READY/AVAILABLE IF:
ITEM TO BE INSPECTED. Procedure
B 7
*
D
A
*
A=After Operation
D=During Operation
MAGAZINES. Check spring action and free up and down movement of maEazine follower. Movement should be smooth and strong.
ff magazine follower movement is not smooth
and strong, B
*
* DAY OPTIC SIGHT SYSTEM. Sight through the day optic sight, Inspect for visual obstruction of target image by dust, dirt, fungus or moisture on optical surflces, and ioose or bioken optical
elements. ff these conditions
9
*
*
10
*
*
resist correction after
cleaning lenses, DAY OPTIC SIGHT AND MOUNTING. Check for damaged, loose or missing
a.
parts.
ff parts are loose or missing.
b.
Check to ensure that day optic is securely mounted to mating split on scope rings, receiver dovetail, and that the reticle is oriented
correctly. ff scope is loose or reticle is canted'
11
*
*
c.
Ensure day optic sight dust covers are installed.
Clean dust and other foreign matter from lenses (see para 3-7).
SAFETY/TRTGGER FUNCTTON CHECK. Perform safety/function check as shown in paragraph
2-23.
44
If rifle fails safety/trigger function check.
2-23
SAFETY
/
TRTGGER FUNCTTONAL CHECK
WARNING Always clear rifl€ befor€ checking function of safety and trigger. Refer to para 2-6 for pruper clearing procedur€s' Checking SAFE Position:
a.
Remove magazine. Pull charging handle fully to the rear and lock bolt to the rear. Retum dlarging handle to its furward position. Visually dteck receiver and chamber area for ammunition or foreign objecls. Release bolt catch and allow bolt to lock into battery, Rotate safety to SAFE position.
b.
Squeeze bigger fully to the rear. You should not hear anything as the hammer should not
fall.
Release the trigger.
Checking SEMI Position and Disconnector:
a. b. c. d.
Rotate safiety to FIRE position. Squeeze bigger fully
b
the rear while listening for the hammer to snap foMard'
you should hear hammer snap forward with a distinct click. Contjnue holding the trigger fully to the rear.
While holding the trigger to the rear, pull the charging handle fully to tfie rear. Ride the charging handle forward slo,\rly and listen for the hammer to fall. You should hear nothing as tfie hammer should be held to the rear by the disconnecbr.
e.
Slorrly rclease the bigger. You should hear a light click as the hammer is r€leased from the dis@nnector and engages the
s€ar.
f. g.
Squeeze the bigger fully to
he rear.
You should hear the hammer fall brward with a distinct click.
Close the ejection port cover.
45
SECTION
V:
OPERATING UNDER NORMAL CONDITIONS
WARNING Keep finger away flom trigger unless you observe a taryet and intend to fire, Make sune the rifle is not already loaded by inspecting the magazine and chamber.
2.24
LOADING AND UNLOADING THE RIFLE
WARNING Use only seruiceable and authorized
ammunition. Inspect ammunition for defects prior to loading magazines.
LOADING THE MAGA|ZINE
a. b. c.
Load magazines one round at a tirne. Do not use dlarger clips. Place eadt round between magazine lips and push down until round rotates under feed As rounds are pushed down, slide them
b
lips. Never load more than 20 rounds.
the rear of the magazine.
UNLOADING MAGAZINE
a.
Stip one round at a time out of the magazine by pushing on the carbidge rim. Do not bend or detorm magazine lips when
stripping rounds from magazines.
b.
An alternati\€ method is to push top round slightly forward and depress the base of the second round under the pr€ssure on the top round making it easier to remove.
46
it.
This relisr'es
LOADING RIFLE AND FIRING i
1 I 1
a. b. C.
Plae safety in
d.
Push on upper portion of bolt catch to release
Point rifle in a safe direction and lock the bolt to the rear
wih bolt catch.
SAFE pogition and visually check chamber and receiver areas.
Insert loaded magazine into re@iver magazine well until the magazine catch engages and posiwely retains magazine. Slap bottom of magazir€ with palm of hand to be sure.
bolt. Bolt will spring forward inb battery and load first round into chamber. WARNING
Rifle is now loaded, Keep it pointed in a safe direction, If you rctate the safety to the FIRE position..'. THE RIFLE WILL FIRE WHEN YOU PULL THE TRIGGER. UNLOADIT{G
' i 1
I ' l
]
a. b. c. d.
Point rifle in a safe direction. Rotate safety to the SAFE position if possible. (If hammer is not cocked, safety can not be rotated to SAFE.) Remove magazine by pushing in magazine catch button while pulling magazine from receiver.
Pull charging handle fully to the rear and lock bolt to the rear by pressing on the bottom portion of the bolt catch. done so already, place safety on SAFE.
e.
If not
Inspect chamber and inside of receiver areas for cartridges or brass. Remove any rounds and other debris. Let the bolt go forward and close the dust cover,
47
WARNING Ensure there are no caftridges in the chamber or receiver.
2-25
DAY OPTIC SIGTIT
NOTE ll you do not see the scope's full tietd of view when your cheek is in its normal shooting position on the stock (stock weld), reposition the scope foward or backwards betore prcceeding. Para2-15 rcfers.
a.
EYEPIECE/RETICLE FOCUSING. With proper focus, both reticle and target will have maximum sharpness. To properly focus the reticle and scope, you should have an area where you can obserue a target at about 300 meters. Focus the scope yourelf-all human eyes see things differently.
M)IE Eyepiece fnusing is Fiormed after mounhhg the day optic sight and supporting the rifle in a steady resL Ale, when unsrewing the eyepiece, make sure it is not @mpleEly rotatd otr tfie s@pe body. ff the eye pieLe is aheady too far baclA robte the lock ring and eyepie foruard.
(1)
Rotate scope's variable power ring to its highest magnification and the targevparallax focusing knob to its inflnity setting. Unscrew the eyepiece one turn @unter-clockwise to back it away from its lock ring. Make sure lo€k ring is free by turning a quarter turn.
(2)
Point the rifle at a clear area of the sky and turn the eyepiece while observing the sharpness of the reticle as you turn the eyepiece. Turn the eye piece several revolutions so as to move it at least 1/8 of an inch. It will take this much movement to change reticle sharpness.
(3)
Once at the best focus point, turn the eyepiece back and forth through the focus point until the reticle is at its maximum sharpness.
(4)
Now, look away from the scope at some distant object and let your eyes focus on that object. With your eyes focused for that distance, quickly look into the scope at the reticle. It should appear clear and sharp. 4A
(5) dn!
Repeat Steps 2-4 until focus is set for your eyes. Then screw the lock ring up against the eyepie€e-hold ttle eyepiece in nand and do irot let it move as you rotate the lock ring. Turn the lock ring until finger tight against the eyepiece.
Elevation & Range
Knob-_=_*
Eyepiece Lock Ring
Parallax & Focusing 'Knob
Variable Power
n\
Windage
Figure 2-10 Day Scope Control Locations
49
Eyepiece
b.
TARGET/PARAL|-AX FOCUSING, The day optic has a target focus and parallax adjusbnent knob on the left side of the scope. once the reticle focus is set as described above, the scope is then focused on a target as follows:
(1)
Observe the markings on the dial. The larger dots are settings for closer ranges, the infinity mark is for the most distant brgets. Note the dial stops at either the minimum or maximum setting.
(2) (3) (4)
Steady the rifle and observe a small target at from 100 to 300 meters thmugh the scope.
(4) c.
When shooting at closer or more distant targets, the dial may require re-adjustment.
Move your head slightly from left to right and note if the target appears to move away from the center of the crosshairs.
If target appears to move. parallax is present and you need to adjust the knob. Rotate the target focus/parallax knob itigtrtty in one Oirection and then the other and observe the effect in the apparent target movementty moving your head as beiore in paragraph (3). Find the best knob position for both the elimination of parallax and target focus.
ZEROING THE DAY OPTIC. Once the reticle and scope are properly focused, zero it with the rifle's correct ammunition. The elevation knob can be replaced and are calibrated to the bajectories and standard velocities of specific rounds at sea level. The knob marked 7,62 is for M118 LR ammunition used in combat by snipers. The elevation zem and adjustment knob is on top ofthe s€ope. The windage zero and adjusunent dial is located to the right side ofthe scope. IYOTE Always zero, or re-zero, wiffi the @nect ammunition or the ammunition you will use while on a mission' 3OO METER ZEROII{G METHOD
(1)
If measurable
(2)
fired. Unload rifle and move down range to
Set elevation dial to 300 meters (3 mark on the upper scale) setting and windage dial to zero (0) setting. wind is blowing, make appropriate adjusbnent to windage dial. Fire a 3-shot group at 300 meters. Use a large target to capture all rounds spot the 3-round group. Take the rifle with you.
(3)
Calculate the clicks necessary to move the shot group (point of impact) to the point of adjustments apply:
50
aim. The following click
Elevation Dial:
1 minute of angle (MoA) per
click. At 3oo meters, one click equals aPprcximately 3 inches. At 200
meters, one click equals 2 inch, At 100 meters, one click equals 1 inch.
Windage Diah 1/2 MOA per click. At 3OO meters, one click equals 1.5 inches. At 200 meters, one click equals 1 inch. At 100 meters, one click equals U2 NOTE
inch.
If yout
shot group does not apryar on
brge,
(4)
apply 25M Eroing procedures.
Ignoring the markings on the dials for the moment, rotate the dials the estimated number of clicks to move impact to the point of aim.
(5) (6)
tle
point of
Re-fire a 3-shot group from 300 meters. Repeat Steps 3-4 until the point of impact is the same as the point of aim'
Carefully loosen the three small set screws located around the edges of the elevation and windage.knobs with a 1/16" Alen Wrench.'Cently rotate (slip) dials to appropriate (for example the number 3 for 300 meteB) numerical range/windage settings. For example, if you were actually zeroing at 300 meters, rotate the rcnge knob after loosening the three small set screws untjl the 3 on ihe'upirer scale lines-u1i with thl scope's zero reference mark. Note the small set screws need only be lmsened 1or 2 turns to allow dials to rotate freely without aciually changing internal zero adjustrnents. If wind is blowing, make appropriate compensation for zero (0) windage setting in the same manner.
(7)
Re-tighten the small set screws. Do not over tighten. Use "short" end ofthe Allen Wrench for tightening, "long" end to loosen small set screws
51
25 METER ZEROING METHOD. The 25 meter method establishes only a rough zero, never rely on it for tactical applications. Always confirm zero at longer ranges. 300 meters is recommended.
(1)
Adjust focus knob to the 25M target. The target need not be in pedect focus for 25 meter procedure. Note that a black paper disk with a small aperture hole in the center, placed over the objective lens, may bring the 25M target into better focus.
(2) (3) (4)
With elevation set at 300M, Rrc a 3-shot group, unload rifle, and move to target. The point of impact for the 3-shot group should be approximately 1 inch below the point of aim. Make appropriate elevation and windage click adjusbnents as follows:
Elevation Dialr At 25 meters, one click equals approximately 1/4 inch. Windage Dial: At 25 meters, one click equals 1/8 inch.
(4)
Repeat Steps 1-3 until point of impact is approximately 1 inch below point of aim.
(5)
Perfom 300 yad zercing prcoedurc to establish true zerc. NO|E
OnG rifle has been zeroed
@nsiderd aryrcximab. If
300 medrs and elevation diat Et to that range, att otfier mnge markings shoutd be a speific range b required for bdical su68, confrrm zero at actual mission range, known ahead of Ame, when ever possible.
at
if
52
]' I
d.
MIL DOT RETICLE. The Mil Dot Reticle is a modified duplex crosshair style with thick outer s€ctions that thin as they
approach the center and cross. A special feature of this reticle is the series of small dots equally spaced on the thin crosshair ...tion.. There are four dots on each side of center. The first dot is I mil from the center, and each of the other dots 1 mil apart. The end dots are 1 mil fmm the ends of the thick outer section.
For your r€fel€nce in YARDST 1 mil equals
,
I
yard (about 35 inches) at 11000 yards'
1 mil cquals
U2 yard (about 18 inches) at 500 yards.
1 mil equals
U 4vard (about 9 inches) at 250 yards.
For your reference in METERS: 1 mil equals 1 meter (about 39.37 inches) at 1,000 meters'
1 mil equals
Il2
t.t
1 mil equals
tl4
meter (about 10 inches) at 250 meters.
.,
(about 20 inches) at 500 meters.
Foryardsvs, Meters(yards x.9144 = meters).......... ............Metersvs.Yards( meters +.9144 = yards)comparisons: Yards 100 200 300 400 500
Meters
9r.44 182.88 274.32 365.76 457.20
Yards 600
Meters 548.64 640
700 800 900
73t.52
1000
9r4.40
Meters 100
200 300 400 s00
T;
823
53
Yards 109.36 2L8.72
328 437.45 s46.81
Meters 600
700 800 900 1000
Yards 656.L7 765.53 874.89 984.25 1093.61
The spacing of the dots allows the shooter to accurately estimate range to objects of known size. For example, a distant target is estimatei to be O-feet tall, which equals 2 yards. When viewed through the scope, this human 6-foot size target would appear as: 2 mils at 1,000 yards...4 mils at 500 yards...6 mils at 250 yards. You may also use the following formula
b
estimate range: (yards may be substituted for meters)
x Height of target in yards = Range Height of target in mils 1,OOO
At 100 Yards: mil = .900" mil = 2.700" 1 mil 3.600" 5 mils = 18.00"
1/+ 3/q
=
K 5 mils
lLt mit I mil Figure 2-11
.8 Mil-Dot Reticle 54
Using this reticle's mil dot system at 10x and the height or width of a known objecL it is possible to determine range to that object. Always us€ the crosshairs or a mil dot for an aim point when shooting.
1,000 x Height of target in yads
Height of target in mils
= Range
Exomple of o lerrorisl lorgel ol 500 yords ond sniper using reticle pottern os o ronge finder. (Torgel is eslimqted of 2 yords toll, qnd oppeors lo meqsure 4 mils loll) 2-12 Mil-Dot Target Range Estimation 55
2-26 BrPOD
(OPTTONAL ACCESSORY)
WARNING
Always unload and clear rifle before attaching or detaching bipod.
a. (1) (2)
BIPOD ATTACHMENT
Point bipod legs forward towards muzzle.
Loosen bipod set screw. While squeezing side plates together, engage lugs with bipod mounting adapter or stud beneattl forend. Relax grip on side plates.
(3) (4) b. c. (1) (2) (3) (4) (5) d.
Position bipod mounting base against forend and turn set s€rew finger tight' Using a coin, or flat blade screw-driver, tighten set s€rew firmly, but no more that 1/4-113 of a turn past "finger tight"' BIPOD REMOVAL is the reverse of attachment procedure. BIPOD LEG ADJUSTMENT-from folded (up) position: Grasp bipod leg one at a time and rotate down away from barrel.
Depress leg release cakh while grasping bipod leg foot and pull out (extend) to desired length. Leg releas€ catch is spring loaded and automatically locks leg in extended position' Repeat for other
leg. Bipod legs may be rotated up when they are extended if desired'
Retract legs by depressing the leg release catch and pushing bipod leg in. BIPOD MAINTENANCE
Wipe steel parts with an oily rag to prevent bipod leqs.
rust.
Do not apply oil to the leather pads on bipod saddle or the rubber ends of the
Recommended Mounting Locations for Bipod Adapter and other Accessories: Note that "T" designates the Top Rail, "L" the Portside Rail, "R" the Starboard Rail, and "8" the Bottom Rail.
Front Scope Ring in Groove T17
Optional Groove Locations for Sling Swivel Studs L28 L24 L20
Bipod Adapter in Groove 825
Sling Swivel Stud in Groove 828
Handguard Panels in Grooves L18, 81B & R18
Note: The Bipod Adapter needs to be in 825 to allow the Upper receiver to fit easily into the Form Fitted Case.
Figure
2-13
Recommended Accessory Groove Locations
57
Flear Scope Ring in Groove T6
Case Deflector in Grooves
T8&9
Rear Sight in Groove T3 or T2 (T3 is best when Scope Cover is used)
SECTION
VI:
OPERATION UNDER ADVERSE CONDITIONS NOTES
Adverce or unusualcondition are defined as any conditions requiring other than normal maintenance for continued operation and seruiceability of the rifle.
pefform the special maintenance procedures listed herein or take appropriate Passive Protective Measures outlined for the climate and weather conditions that most apply to your operationalarea. Refer to paragraph 3-2 for normal lubrication instructions.
2-27
EXTREME COLD/ARCTTC
CAUTION Be careful not to accidentally fire your rifle when insefting gloved finger into the trigger guard area.
NOTE
If glot6 ot mit@ns
are
b be wom, &p/e55 Adgger gaard duryer
and ryen biggar guard
br
ffi
of tigger
affi
with
glo@
finge6.
a.
Use Lubricant, Arctic Weapons (LA\U for lubrication and warm (body temperature) CLP for cleaning.
NO|E
Qrry q-P in an iMde shitt pocket b kep it fluid
b.
To a weapon that has been thoroughly cleaned free of other type lubricants, apply a light coat of IAW to all functjonal parts.
58
l
I '
Avoid bking the rifle into warm pla6 for short periods of time. However, clean and lubricate your rifle at room temperaturc if possible. When movinq a cold rifle and ammunfion into a warm place, condensation/moisture will form in and on the surfac of the rifle and ammunition. If practical, leave your weapons and gear outside in a protected, but cold area. when the rifle is brought inside a warm place, it should be field sbipped and wiped dry s€veral times as it reaches room temperature.
c.
d.
When returning to the cold, prevent condensation of moisture and fr€elng of parts by keeping the weapon completely covered when moving from a warm to a cold area, thereby allowing the metal parts to cool gradually.
e.
' ' i I ,
Keep the rifle and scope as dry as possible. Keep dust cover closed.
f.
Keep ammunition and the insides of magazines not lubricab ammunition.
g.
Moisture can cause malfunctons because it will freeze and tum to
ice. Do
Do not lay a warm weapon directly on snow or ice.
The use of a muzzle cap, protective magazine bags, and an or'erall rifle cover will help protect your rifle. Use them when the tactical situation permib.
n.
Always keep snow out of the bore. If snow should get in the borc, field strip the rifle and clean the bore from the dEmber end as in the bore cleaning instructions.
i.
j.
For extended operations in extseme cold, have an armorer remove
k
MOST IMPiORTANT--Unload and hand functlon rifle every 30
2-2A
'
dry.
tigger guard.
minuhs
b
prcvent fl€€zing of Parts.
HOT, WET, JUT{GLE CLIMATES AND FORDING OPERATIONS
a.
perform mainbnan@ more frequently to prevent corrosion. Keep a light coat of lubricant on all metal surfaces. Wipe away moisture left by finger and handprinb.
Frequendy inspect hidden areas of the bolt and canier assemblies, locking lugs of barrel o(bnsion, dEmber, lower receiver and receiver extension (buffer tube), and bigger assembly areas. Check and lube spring loaded debnts for free spring action.
b.
c,
Unload and check magazines. springs, and ammunition daily rcloading. Do not lubricate ammunitjon.
59
if neGsary.
Wipe ammunition dry with a dean
cloti
before
The use of a muzle cap, probctve magazine bags, and an overall rifle cor'er will help protect your rifle when the tactical siujation permits. Keep optical sights as dry as possible and out of the direct rays of the sun,
d.
e. If rain or water
gets in the bore, field sbip the rifle and clean the bore from the damber end as in the bore cleaning instjuctions. Check that the bore is clear if 1ou fall, or drcp tfle rifle at night or in the mud and after fording water ob6tacles. Detail clean, dry and re-lubricab if the rifle becomes submerged. Perform After Fording Prccedurcs if you s,wim l',lth the rifle'
f.
IIOST IMPORTANT--Keep the rifle well lubricaEd and as dry as possible,
2-29
DESERT CUMATE9-HOT/OOLD, DRY/WET, SA'{DY/DUSTY
Do not lubricab exterior of weapon unless @nosion becomes a problem in humid coastal areas. Lnbricate internal moving parts as direcEd in paragraph 3-2 for nomal onditions, Mo6t importandy, however. follow the Passive Protective M@sures below:
a.
Use a muzzle cap to keep sand out of tie bore--especjally during a stalk or when maneuvering through a bench line. Use the drag bag or o\/erall rifle protective bag if the tactical situation permib. Use magazine bags to proEct ammunition and magazines.
(1)
(2)
To seal airborne dust and blowing sand from the receiver interior while in administratjve areas, keep the bolt closed on an empty chamber, the dust cover closed, and an empty magazine in the magalne well.
b.
sun. Ammunition warmed by the hot sun may not
c.
if necessary. Do not lubricate ammunition but lube magazine spring lightly
Keep the optical scope and magazines/ammunition from the direct rays of the shoot to the rifle's zero.
Unload and wipe clean magazines/ammunition daily (as for normal operations).
d.
MOST IMPORTANT--USe
nomal amounts of lubricant on intemal moving pats and follow the Passive Protective
Measurcs listed above,
60
2-3O AFTER FORDING PROCEDURE$-|f the tactical situation
i
a.
Keep muzzle pointed dov.rn and remove muzzle cap if present.
b.
shake rifle vigorously.
c.
Pull charging handle only 2 drain out muzle.
d.
b
allows no time to properly dean bore.
3 inches to the rear (so as to only padially exhact the round in the chamber) and allow wabr
b
Release charging handle to reload chamber. close dust mver.
,
e.
' i ' I
2-3L IMMEDIATE ACTION/EMERGENCY
When time and sihlation permits, unload and hand operate rifle and clear the drain hole in buttstock with pipe cleaner and drain buffer tube.
a.
PROCEDURES
If your rifle stops firing unexpectedly and the tactical sihJation demands you must contjnue firing, point it in a safie dir€dion
and perform the fullowing immediab actions:
ffl
Shp upward on bottom of magazine to make sure its properly seaEd.
(2) Pull charging handle all the way
b
the rcar.
Ob6erve ejection of empty case or complete round (if
any). Visually chect
dramber for obstructions,
, '
(3) If the chamber is clear, release chatging handle to feed a ncw rcund inb the chamber.
Do not ride the charging handle
forward, let it spring forward under pressur€ from the compressed recoil spring. and atbmpt to firc again. If rifle again fails a nonr magazine and reload, aim and attempt to firc again,
(4) Aim the rifle
b. If dfle again does not firc, clear the n'fle and apply
b
fire, remove magalne, lock bolt
b
rear and clear dlamber, select
tJre rcmedial actions on the follotving pages.
61
2-32
REMEDIAL ACTTON/ EMERGENCY PROCEDURES WART{ING
If your rifle stops firing with a live round in the chamber of a hot barrcl, point the rifl€ in a safe dir€ction and remove the lound fast. Howser, if you cannot nemove it within tO seconds, keep the rifle pointed in a safe direction, rcmove ttre magazine and wait 15 minutes for the chambercd tound b cool beforc initiating rcmedial aclion, These arc prccautions b prcvent injury or death from a cook off. Regardless, keep your face away frum the ejection port while clearing a hot dramber. Remedial action assumes that faulty ammunition is the cause of the rifle's failure to fire. In other words. there is either a cartridge case stuck in the dlamber or a bullet lodged in the rifling just in front of the dramber. Lock the bolt to fie rear and clear these obstuctions as follolvs:
a.
(1)
To clear a sbJck cartridge case, bp it out with a deaning rod inserted from the muzzle. Do not attach anything to the cleaning rod end for these procedures. ff a complete cartridge is ejecftd, a faulty primer probably caused the malfunction. So dreck the primer: has a normal firing pin indentation and the chamber and bore are clear of obsbuctions. reload with fresh ammunitjon and test fire rifle.
If it
If primer is not indented sufficienfly, check firing pin tip for a broken or flattened tip. Also see paragraph 3-4.1, Failure to Fire in the Trouble Shooting Table:
M)fE A relabd malfundion
b a sdt* @ttidge cas is a 'ruphtd atui&E @1 "Fail b Chambef in pragnph. 34.7,
k
Ttouble grooting
Produrs
WARNING
oeedenced during firing, immediaEly cease firing and clear the rifle. The "pop" could have been an incompl€te powder bum whkh jams a bullet in the borc just in ftont of the chamber. If you chamber another rcund and firc it with this type borc oHrucblon, tlre rifle will blow up and possibly iniurc or kill you,
ff an audible "pop" or rcduced rcooil
is
62
(3) If gentle tapping on the cleaning
rod will not dislodge the stuck bullet, seek an Armorer's assistance.
CAUTION Be careful not
2-33
to damage the crown of the muzzle (the area of the bore where the rifling ends). Crown damage will significantly degrades accuracy.
DOUB1E FEED/BOLT CARRIER JAMMED
Bent magazine lip6 can creab a feeding malfunction where more than one round is stripped from the magazine. This extra round can jam the,canier and bolt to the rear. It is near impossible to force the carrier forward under these conditions. It is also impossible b open the upper receiver because the canier has partially entered the buffer tube. The only dircction the caFier and bolt can
a.
move with a double feed is to the r€ar, but the charging handle is usually jammed as lvell by the double feed. ff this
malfunctjon occurs, follow these step6:
(1)
Immediately place safety on SAFE, drop to your knees if standing or roll to your side if in the prone position. and remove
magazine.
(2)
Push in firmly on bottom portion of bolt cakh so as to lock the bolt to the rear during the next sbp and point
muzle up.
WARNING Keep face clear
ol muzzle during these procedures. The rifle could fire.
(3)
Slam rifle butt on the ground. Keep pressure on bottom of bolt catch. Bolt and carrier should move fully rearward and lock behind bolt catch lug. with bolt locked to the rear, shake, or otherwise clear loose rounds from interior of receiver.
b.
If attempts at slamming the buttstock on the ground fail to move bolt to rear, use a cleaning rod inserted from the
ejection port to push the bolt rearward until it is held rearward by the bolt catch.
63
CHAPTER SECTION
3-1
I:
3
MAINTENANCE INSTRUCTIONS
INSPECTION AND LUBRICATION
INSPECTION GUIDE. Clean and inspect pafts before lubrication.
WARNING Do not interchange bolts between rifles.
BOLT. Cracks or fractures, especially in the cam pin hole area and around the locking lugs. Bolts that have pits in the bolt face o6ending into tfie firing pin hole (hole out of round) need to be replaced. FIRING PIN. Bent, cracked, flattened or sharply pointed tip. Firing pin tip should be rounded and smooth. Check firing pin protrusion by ins€rting firing pin through bolt and observing the tip protruding from the face of the bolt' CAM
PIN,
Cracked, chipped, or pitt€d?
FIRING PIN RETAINING PIN. Bent or badly wom. Should wiihdraw to its stop freely, but not come los€ from the carrier body. EXTRACTOR AND EXTRACTOR SPRING, Chipped or broken edges in the area of the extraction lip that engages around the rim ofthe cartridge. Extractor spring not seated properly. EXTRACTOR SPRING BUFFER. Broken edges, missing or not seated properly.
CHAMBER AND BORE. Excessively oiled, pitted, dirty, obstructed. Locking lugs of barrel extension fouled with excess lubricant. IIIOTE Several of the above parE may
fu
canied as sparu in the Deploymmt Kit Periodicaly insped these patb and lubriate them e tt ey dont rud.
3-2
LUBRICATION GUIDE. Over lubrication should be avoided at all times. A light to medium coat of lubricant is all that is required to prevent rust. Th€ following lubricating instructions arc for before operations and firing. not storage.
WARNII{G Befor€ the rifle is fircd, wip€ any lubricant from the chamber and bore with one or turo clean dry patches, each run thrcugh the bor€ twice, This leaves just a trace coating of oil to those ar€as for sholt term coFosion
prctection.
KEY DEFINMONS.
LIGHTLY LUBED: A thin film of oil barely visible to the eye. Wetting a cleaning patch with 5-10 drops of oil and then wiping the area over several times with the same patch should produce this effect and spread the oil thinly and evenly. GENEROUSLY LUBED: A medium thick film of oil that can be spread or dabbed-on with a finger. This can be applied with the fingers or a patch wetted with 20-30 drops of oil.
a. (1)
UPPER RECEIVER (These procedures assume
the rifle has been Field Stripped).
Lighuy lube the inside of the upper receiver with oiled patch or angle-head, soft bristle, tooth brush. This includes the locking lugs and feed ramps of the barrel extension. A soft brisue tooth brush works best for locking lugs of barrel extension.
(2)
Place one drop of oil on dust cover Brush/wipe off excess oil.
detent. Push detent in several times to work oil past detent into spring area.
(3)
Place one drop of oil on each end of the dust cover hinge. Work oil in by rotating dust cover open and closed. Brush/wipe off excess oil.
CAUTION Be careful not to get solvents or oils on the scope lens when cleaning or lubricating rifle or to scratch them while cleaning.
(4)
Instnll Bore Rod Guide into Upper receiver. Assemble clean patch to cleaning rod tip. Push cleaning rod through the receiver, into the chamber, and through to the muzzle two or three times. Repeat this with another clean patch paying 65
particular attention to wiping the chamber clear of old lubricant by robting the rod clockwise. Then with a lightly lubed pakh, push the rcd through to the muzle and back again, 2 or 3 times, leaving just a trace coating of oil.
(5)
Lightly lube charging handle. Apply one drop of oil to catch and spring. Squeeze catch several times and then brush/wipe off excess. Assemble charging handle to upper receiver, but do not push it fully forward.
b. (1)
BOLT CARRIER GROUP.
Lighuy lub€ the firing pin. Apply only a trace of lubricant to the firing pin recess hole with a lightly lubed, doubled-over, pipe cleaner and then pushing the pipe cleaner back and forth thiough the firing pin recess hole. Also pass an end of the lighgy lubed pipe cleaner through extractor pin hole once or twice.
(2)
Using
tie
same, lightly lubed/doubled-over pipe cleaner-push this into the straight section ofthe gas key two or three
times.
(3)
Lighuy lube inner and outer surfaces of bolt carrier. Generously lube carrier slide areas, cam pin groove and hammer cocking surface.
(4) (5)
Lighuy lube extractor and extractor pin. Assemble extractor to bolt.
Generously lube outside of bolt and cam pin. This includes the cam pin hole and bolt rings, Stagger bolt rings and insert bolt into carrier with exbactor to the right.
(6)
Insert cam pin with firing pin hole aligned front to rear. ENSURE FIRING PIN RETAINING PIN IS FULLY WITHDRAWN TO ITS STOP. Drop in firing pin and push it fully forward with cleaning rod section or small end of GP cleaning brush. Push retaining pin flush with caffier body to lock-in firing pin. Shake bolt and carrier assembly to ensure firing pin is retained. BE READY TO CATCH FIRING PIN IF IT FALLS OUT. Work bolt back and forth several times to spread lubricant.
(7)
Pull bolt to unlo€ked position and assemble with charging handle in upper receiver. Push bolt and charging handle fully forward. Close dust cover.
66
I I
c.
LOWER RECEIVER.
(1)
Wipe buffer and inside of receiver extension (buffer tube) dry. Lightly lube action (recoil) spring. Place one drop of oil to bu'ffer detent and push detent in several times to work lube past detent to detent spring. Brush/wipe off excess oil. Assemble buffer and action spring in receiver extension.
(2)
Generously lube take down and pivot pins, Apply one drop of oil to their detent grooves. Work pins in and out several times to spread lubricant.
I 1
(3)
Apply one drop of oil to the bolt catch. trigger guard detent, and magazine catch button areas. Work these controls in and out several times. Brush/wipe off any excess oil.
(4)
Hold hammer down (to rear), apply one drop of oil to each end of the trigger work oil between trigger pin and receiver. Wipe off excess oil.
pin.
Pull trigger to rear several times to
CAUTION
When receivers are open or separated, never pull trigger and let hammer spring forward against receiver wall/bolt catch. Without the bolt installed and the receivers assembled, this can damage the receiver and bolt catch. When it is necessary to lower the hammer, retard it springing fonvard with your non-shooting hand as you pull the trigger.
(5)
Apply one drop of oil to each end of the hammer pin. Rotate the hammer back about 1" s€veral times while keeping the trigger pulled. Repeat this several times to work oil between hammer pin and receiver. WiPe off excess oil.
I
(6)
Rotate hammer back fully wiff trigger pulled and note action of disconnector and rear hammer hook. Apply one small drop of oil each to contact sudaces of the hammer hook and disconnector and in between the sear and the disconnector.
(7)
I
Observe that when hammer is fon rard, the hammer's sear nokh can be observed within the lower receiver. Apply one imall drop of oil to the notch, AND WITH FINGER OFF TRIGGER--cock hammer. Hold hammer with thumb and release hammer by squeezing the kigger. Do this several times to spread oil down to the sear where you can not see. Remove any excess oil with a dry, bent pipe cleaner.
67
(S)
From inside receiver, apply one drop of oil to both visible round ends of the safety selector lever (Safety) shaft (not the midsection/cut-out portion) and to the end of the safety selector lever shaft on the right side of the receiver. Rotate safety from FIRE to SAFE several times. Wipe off excess oil.
(9)
Generously lube the face of the hammer.
(10)
Ass€mble lower and upper receivers. Check action of charging handle, bolt catch, and dust cover. Dry fire rifle once or twice and listen for hammer fall. Close dust cover.
(11)
SAFE
rifle. It is now ready for loading and firing.
EXTERNAL SURFACES. A light coating of oil or rust preventative should be applied to all external metal areas. Plastic, rubber. or glass surfaces should be kept dry. They may be dry brushed with a soft brush (finger nail brush) or wiped clean with a slightly water dampened rag.
3-3
GENERAL
perform Before and After Operations PMCS (paragraph 2-22) if you are the assigned operator and the weapon has been stored in an armory/arms room and not used for a period of 60 days, or if you have just b€en issued tie rifle.
orE
ifl6
as ofun as necffiry b prevent Assigned operatots should perforn PM6 and dean or prerve their @rr6ion, rust, or deted worn and damaged parb wht:ch may reguire replacement The time interual for this activity witt fu determined by the Commanding Officer Thb may be as often as once per wrek in ganison, or more ofun, if neces9ary.
SECTION
3-4
II:
TROUBLESHOOTING PROCEDURES
TROUBLESHOOTING
a.
Troubleshooting procedures are easier to rcmember and use effectively if you first know and understand what normally occurs during the rifle's Eight Steps in the Cycle of Functioning.
68
EIGHT STEPS IN THE CYCLE OF FUNCTIONING.
-- How Your Rifle Works --
(1)
FIRING. (Conditions: round in chamber, bolt locked, hammer cocked) Safety is rotated to RRE. trigger is pulled releasing hammer. Hammer springs forward under tension of hammer spring. Hammer sbikes firing pin and firing pin strikes cartridge primer. Primer detonates from the firing pin impact and ignites propellant (gunpowder) inside cartridge case. Very high pressure (50,000 pounds per square inch) develops inside case as the powder burns. Bullet is pushed from case and accelerated (2,600 fps) down barrel and out muzzle.
(Z)
UNLOCKING. b(panding gas pressure enters the gas tube through a port in the forward area of the barrel. This gas pressure travels through the gas tube into the gas key. Via the gas key, high pressure gas enters the carrier interior, but is trapped by the bolt rings at the front. Consequently, expanding gas pressure begins pushing the carrier to the rear--away from the bolt. As this gas continues to expand, (the bullet has already left the barrel) the bolt carrier continues to move rearward overcoming the tension of the action (recoil) spring. The cam groove of the bolt carrier acts on the bolt cam pin which in-turn causes the bolt to rotate and the bolt lugs to disengage fmm the barrel extension locking lugs.
(3)
EXTRACrION. As the bolt now begins movement to the rear, the lip of the extractor, which is hooked on the rim of the cartridge case, pulls tie case out of the chamber. The lip maintains its grip on the rim of the case through tension of the extractor spring as the bolt passes by the ejection port.
(4)
EJEfiON.
As the cas€ clears the barrel extension, the stored energy of the ejector spring is applied to the rim of the case by the ejector plunger. The plunger completes its action as the case clears the ejection port and is rotated free of the extractor lip and bolt. ff working properly, this sequence throlvs the case through the ejection port and clear of the rifle .
(5)
COCKING. The thrust of the carrier ass€mbly from the injection of expanding gases is so great, it continues to move the carrier and bolt assembly fully back into the receiver extension. As thes€ parts move b the rear. the bottom surface of the caffier passes over the face of the hammer forcing it back and down against the tension of the hammer spring. With the trigger finger probably still to the rear at this moment, the hook of the disconnector engages the rear hook of the hammer, holding the hammer to the rear and down until the trigger is released (subsequently, the hammer is then held back by the sear as the kigger is released). The action or recoil spring is now fully compressed and prepared to thrust the recoiling mass (canier and bolt assembly) forward.
(6)
FEEDING. As the bolt and carrier begin moving fon ,ard under tension of the action spring, the lower feed lug of the bolt strikes the base of the top carbidge in the magazine. The force of the bolt strips a round from the magazine feed lips. As the round begins to move forward, the tip of the bullet hits one of the two feed ramps of the barrel extension. The angle of the feed ramp help6 force the round up and into the chamber as the bolt continues to move it forward in the fe€ding cycle.
(7)
CHAMBERING. Chambering occurs when the cartridge is fully forward in the chamber. If there is an obstruction in the chamber, the cartridge cas€ will not fit the chamber properly and the bolt will be prevented from locking.
69
(8)
LOCKING. With a cartridge fully in the chamber, the bolt has fully entered the barrel extension and has stopped moving fonrrard. Also at this time, the eltraclsr lip has snapped over tie rim into the extractor groove of the cadridge case and the ejector and its spring are iully compressed. The canier, however, contjnues forward under continued force ofthe action spring and through action 6f its "do6 leg" cam pin groove on the cam pin, causes the bolt to rotate. Rotation of the bolt moves its locking lu;s into alignment with [he barrel extension locking lugs. When this rotation of the bolt is complete, the bolt is locked. If the boliis tulty fo-nvard, but the carrier is back slightly out of battery (bolt not fully locked), the firing pin will be prevented from reaching the primer even with a blow of the hammer. See FIRING above. As the shooter releases the trigger for the next shot, the firin:g sea; (trigger sear) enters the hammer sear notch through tension from the trigger spring. Simultaneously' the disconnector ieleases the rear hammer hook. With the hammer fully cocked and the trigger sear engaged with the hammer sear nokh, the rifle is ready to fire again or be placed on SAFE and unloaded.
b.
This manual cannot list all possible malfunctions that may occur. nor all caqles and corrective-actions. If a malfunction is nbt coriiCtr'uie. iohta& xiriotrtt tfiinuriaurina lote: u.s' Niw peisonnel will use the following point of contactl (attn: Mr. r€rry o'Brian, Gvlt srirtilt ca;td acode Esii), roo xighway 361, crane IN 47522-s001 your (812) (812) understandlng or tne Elgnt srcps ln 854-LO44, However, by Commcrcial Teleohone 854-5831 ofFax ure_ciitd;f FJnA-ifiiris ddscri-bed-5obve, you itrbutotre a6te to pin point the sourcebf the problem. Asyou review the iotio#ine i;;udhitiooifrg llbie, iiote B'd ielationships between $e'CAUSE and that part's role during normal functioning.
wi;i;id
CAUTION
Clear rifle and place on SAFE before following Troubleshooting procedures.
TROUBLESHOOTING TABLE
MALFUNCTION
1.
FAILURE TO FIRE
CAUSE
a. Safety on SAFE. b. Defective ammunition. c. Improper assembly of firing pin.
70
CoRRECTTON/ACTTON
a. Move safety to FIRE. b, Eject round. c. Retaining pin passes behind large diameter of firing pin.
TROUBLESHOOTING TABLE (Continued) CAUSE
MALFUNCTION FAILURE TO FIRE
d. Excess lube.
(continued) e. Short firing pin protrusion.
f. Round not fully chambered. g. Hammer not cocking, or
"hair trigger"
CoRRECTION/ACTION d. Wipe firing pin dry and use pipe cleaner in firing pin recess. e. Replace firing pin. f. Clear obstruction from chamber. Clean and lube bolt, cam pin and carrier. g. Check correct hammer spring reassembly. Check sear engagement screw for adjustment, Left screw may need to be
tightened slightly. (See armorer for re-adjustment or new hammer and/or sear.) Replace disconnector (See Armorer).
Rifle (pistol) grip screw is too long or washer is missing.
h. Disconnector screw may need to be tightened slightly. Check adjustment. Check correct trigger spring reassembly. (See armorer for re-adjustment.) i. Loosen rifle grip screw and re-test hammer cocking & trigger Pull.
2. FAILURE TO UNLOCK
a. Gas key clogged.
a. Use pipe cleaner to check/clear gas key.
3. FAILURE TO EXTRACT
a. Chamber b. Extractor c. Extractor d. Extractor
h. Trigger fails to release hammer.
i.
or ammo dirty. spring weak. lip worn. stuck (frozen in place).
71
a. Clean chamber and wipe ammo clean' b. Replace spring and silicone rubber insert. c. Replace extractor. d. Remove, clean, lube extractor,
TROUBLESHOOTING TABLE (Continued)
4.
MALFUNCTION FAILURE TO EJECT
CAUSE Frozen ejector. b. Not enough gas pressure.
5.
FAILURE TO COCK
6.
FAILURE TO FEED
CoRRECTTON/ACTTON a. Clean brass flakes from ejector and clean/lube ejector. b. Stagger gas rings or replace with new ones. Clean gas key. Replace ammunition"
c. Restricted movement of bolt carrier group.
c. Remove, clean, lube. Check gas key fit and gas tube.
d. Restricted buffer.
d. Remove, clean, lube"
a. Hammer spring in wrong. b. Disconnector hook worn, c. Disconnector spring weak. d. Hammer hook worn. e. Hammer spring broken.
a. Check correct hammer spring reassembly. b. Replace disconnector. c. Replace spring. d. Armorer replaces. e. Replace hammer spring.
a. Dirty/corroded ammo. b. Magazine not fully seated. c. Double feed. d. Bolt overrides cartridge. e. Restricted movement of bolt carrier group. f. Restricted buffer.
a. Clean or replace. b. Adjust magazine catch. c. Replace magazine. d. Replace magazine. e. Remove, clean, lube.
g.To many rounds in magazine.
g. Remove excess. h. Disassemble, clean, lube magazine spring.
h, Dirty magazine.
72
f. Remove, clean, lube.
TROUBLESHOOTING TABLE (Continued)
7.
FAILURE TO CHAMBER
a. Obstruction in chamber. b. Dirty/corroded ammo. c. Bullet stuck in bore just past chamber.
CoRRECTTON/ACTTON a. Clear chamber. b. Replace ammo. c. Remove per instructions para.2-30 (2).
8.
FAILURE TO LOCK
a. Dirty bolt/locking lugs. b. Dryldirty cam pin or cam pin groove.
a. Remove, clean, lube. b. Remove, clean, lube.
MALFUNCTION
CAUSE
c. Burrs on bolt locking lugs.
SECTION
IU:
Show to armorer.
MAINTENANCE INSTRUCTIONS
3-5
CLEANING (Refer to para. 2-8 for Field Stripping procedures). Cleaning is the removal of all old lubricant, firing residue, diG debris, foreign matter, and corrosion from the sniper rifle and its associated ac@ssories. The following procedures refer to CLP. This is a combination bore and carbon Cleaner, gun oil Lubricant, and Pres€n ative oil product. Refer to Lube Guide for other authorized cleaners and lubricants. However, the SR-25 requires no special CLP products for proper and reliable functioning under normal conditions. Any good grade of commercial bore cleaner like Shooter's Choice Bore Cleaner; or gun oil like Rem Oil, MIUTEC-I, etc., may be used. Always avoid heavy greases with this rifle. WARNING Clear and SAFE rifle before peforming any maintenance or cleaning action.
73
a.
Use the basic issue cleaning kit and expendable supplies provided through the supply syst€m or one obtained from Knighfs Manufacturing Company. Ensure a good supply of patches. Obtain several absorbent cotton rags. Always shake CLP prior to and during use to keep its teflon flake lubricant in suspension.
b. c.
Field sbip rifle as described in paragraph 2-8 through 2-10.
Wipe the rifle and its parts as clean as possible with a clean rag wefred with CLP. Wipe the chamber and bore with a CLP wetted pakh, then wipe dry.
d.
BARREL AND CHAMBER.
General. Always clean bore from chamber end through to muzzle end. Note that bore brush screws into an adapter and not the rod sectjons. 6o not reverse direction ofthe bore rod until the tip has cleared the muzzle. Rep€at wiping the bore and chamber with patches wetted with CLP. Frequenuy wipe bore rod dry with a clean rag.
Sniper Rifle Bore Cleaning lnstructions
rl \li':rlr". L.
--
'..:::-:^.lj;:-.".. - .r.j41ii--
_': '"4 - :' r
1-1. Bore Cleanino lnstructions-lntroduction, KMC recommends Shooter's Chgice Bore Cleaning products. Shootels m'al-oe iviiiaolti toilite in ioui tocat aieaorPK lf no!, ask youl Co lo get it into the.PX.
cri6i"i"il-.-"iil'iiij7"iifi6duiiiF"i
Government issue Rifle Bore Cleaner (HBC) or CLP may also be used, but these are less ellectlve ln removlng copper Ioullng. 74
There are 3 main steps in bore cleaning: (Step One) Clean out the Carbon using a quality bore cleaner. (Step Two) De-foul the bore of copper residue with copper removing compound. (Step Three) Keep the bore from rusting by neutralizing Copper removing compound and wiping with preservative oil.. WARNING
Clear and SAFE rifle before cleaning bore.
htoE:
fuld. Tte predurs are ditrerent fuau9 the ffi and facili(6 availabb in gaffiwl or in rear at@s arc not usually awib e in a fowatd @toyd field envimnmenL fu a@mde in ganifin or when evs els WiUe, use only the @e'pitre bote nd bcaus it is me likdy b fu staight and tlEreforc be 16 hkely b danage tle fure fiwn tWaM L@, When depbyd in the fieu, W wouu nwt lil
an
for annory
u
in the r@r (gaffietl) area, and dE for the
,dintlreM.
1-2. Bore Cleanlng Procedures-General' The Basics: lf oossible. use the one-Diece cleanino rod and the Knlqht's SR.25 Bore Rod Guide provided with the Sloner Rifle System. The rod is stored in the rifle carrvinq casd lid and/or the Krn-ohfs SR-25 Bore Rod Guide is in the box lor the cleaning kit components that may also be stbre-d in the rifle case lid.
a.
b. Field skip rille as described in paragraphs 2-7 through 2-10, of the Operator's Manual. c. Wipe the rifle and its parts as clean as possible with a clean rag. d. lf so equipped, lock down the flip-up scope covers or otherwise cover both ends of the scope to protect bore cleariinb'solvents.
75
the lens surfaces from
H"1's,q!fliitElb?flsi#t}3r#'liH"ri"Hl'f;ilL{t4i'$li:if'j{tr$i,i$#iii!li1ir",{!iJifiH"lt{fls,# roo'ti6 oi o-,lrb tirldE Eis-iiirii6dltiij-m-uilie.-ih!'tingeii ot your free hand may need to keep the Guide Pilol Sore
ioo rjritiiine
in-place when the rod ib pulled back out of the bore.
Note: When the bore is dirty, do not pull dirty patches back throu.gh the bore because it re-introdubes fouling to the bore, chamber, and bore gune. Onlv oush wet patches one-wdv. Remove each patch from the rod as it Cbii{tne mizite if it appear"s Airty. Frequently wipe the bore rod dry with a clean rag.
:':::
.t\f
I
\.:\
'l:
ta=
Dirty patch-do not pull back through the bore
Once oatches wet with bore cleaner clear the muzzle reasonably clean, then scrub the bore with the brass bore brush' """"[fi;i'liiriiin' i'iA ;uiit/oGs-wnitnd obre-oruin,-Ciange 6ack to'wet bore patches as described previouslv.
rhe one-wav process with wet ,"'f,!,"r'r'r",gi Sights Up
ff::1;'j::,1:::{":,';fi[J[3/H'33,fJ?anins
time' tt atso hetps the bore
f. Anv time the bore needs cleaninq,
so does the chamber. The chamber Bore cleaner or CLP. Choice Shooter-s with either Can b'e cteaneO
muzzle pointed downwards and the sights 6rientaied-uo to o"revent boie cleaner from collecting in bolt locking recesses of the chamber area or seeping into the gas port.
o. When cleanino the bore, keep
Muzzle Down & Scope Caps shut. 76
1-3. Clean the Chamber when cleaning the Bore. First, swab out the chamber with Bore Cleaner or CLP applied to cleaning patches.
Close Scope Caps to protect lenses from solvent
Second. usino the SR-25 Chamber Brush assembled to the Chamber & Biass Brush Rod, scrub out the chamber in a clockwise direction with the brush fully inserted into the chamber. Turninq the chamber brush clockwise will keep the brush from unscrdwing from the rod.
Third. use a oeneral ourpose brush (or tooth brush), additional bob cleaner or CLP and a piece of raq to clean residue from barrel extension lockinq iecesses. Pipe cleaners trom ihe cleaning kit and/or Q-Tipg riay also be .usbd for the locking recessesl Wipe the chamber and bore dry with clean/dry patches. ,
Note: '----'Since
the chamber is much lareer in diameter than the bore. you may need to double-up the patches when wiping the chamber. Two fatches will usually tit the slofted bore rod tip when cleaning the cnambeL
Fourth, dry the chamber with cleaning patches.
77
t-4.
Cleaning the Bore-Detailed Procedures.
Step On*Clean out the Carbon
Close Scope
(1) lnstall Knioht's SR-25 Bore Rod Guide in receiver and slibe the Bore Hod Guide Pilot over the rod before inserting the rod into the Bore Rod Guide. Screw the nylon bore rod jag into the end of the rod or rod adapter
cap
Q\ Hold a oatch wet with Shooter's Choice Firearms Bore bfeaner cehtered at the rear openinq of the Kniqht's SR-25 Bore Rod Guide and push the batch completely-through the bore with the rod. Remove the patch as it clears the muzzle and then pull the rod out from the rear. Wipe the bore rod dry. Repeat this process with clean wet patches through the bore at les appear clean. clean. lea'st four times or until the patches
iei"#i"r'b5lioi,6['ine-oii"'it Bore Rod Guide
)
Firot
"*-*ffi.-
- **wwffi Wffi-r
W /
/
Nylon Bore Rod Jag
NOTE: As the patch or bore brush enterc the bore rod guide, slide the Guide Pilot into the rear opening of the Bore Rod Guide to provide additionalsupport to the bore rod"
Slide Bore Rod Guide Pilot Forward
7B
NOTE: In the freld use the Bore Rod Guide as a means to hold the receiver's apart for ease of using the bore rod as shown in these pictures:
Note the bipod rs being used to support the front of the rifle as well.
tlsing the Bore Rod Guide in this manner with the bipod helps keep the sighE up, drains solvent away from the chamber, and keeps the rifle stable for bore cleaning. 79
cleaning pakhes are to large they may be to difficult to push through the bore, ei$ler cut down the patdl to rcduce its size, or remo\€ the nylon bore rod jag from the rod and by just the rcd end.
Notet If your
(3) Replace nylon bore rod jag with a bore brush, and push this through the bore and back I or
10
times. Remove bore-brush
and re-attach nylon bore rod jag. Boll
borc brush between the layers of a clea, ,un
"#?L7*
u"" to remove carbon
residue from brush bristles.
f4) Hold a oatch wet with Bore Cleaner centered at the rear oDenino of the Kniqht's SR-25 Bore Rod Guide and push the patch io'moletelv ihrouoh the bore with the rod. Remove the oatch ab it cldars lhe muzzle and then pull the rod out lrom the rear. Bepbat this procdss with clean wet palches at least foui limes or until the patches appear clean.
(5) Replace nylon bore rod jag with a bore brush, and push this through the bore and back 4 or 5 times. Remove bore-brush and re-attach nylon bore rod jag. (6) Hold a oatch wet with Bore Cleaner centered at the rear oDeninq of the Kniqht's SB-25 Bore Rod Guide and push the patch do'mDletelv lhrouoh the bore with the rod. Flemove the Datch ab it cldars the muzzle and then pull the rod out from the rear. Flepbat this proc6ss with clean wet patches at least foui times or until the Patches appear clean. (7) Dry patch bore thoroughly. This requires 3 or 4 cleanidry patches. Step TwG-De-Foul the Bore ol Copper Residue.
(1) Hold.a oatch wet with a CoDDer Bemover (like that offered commercially by Shooter's Choice) centered at the rear opening df'the Knighfs SR-25 Bore Rod Guide and push the patch completely throudh the bore wilh the rod.
Note the blue/green color caused by the chemical reaction of the Copper remover agairist the copper fouling.'
Remove the patch as il clears the muzzle and then pull the rod out from the rear. Repeat this process with clean patches wet with Copper'Remover at least four times. Wipe bdre rod dry with a clean rag.
80
(2) Wait 5 to 10 minutes for the chemical to attack the copper. Caution Do not allow @pp€r Remover
b
r€main in borc for mor€ than 10 minuhs because it maY attack the barel steel.
8.l*ff1L333:"'1.,fl3'""yi:i:iffTiJ,S,9li?ffJ'l',"#',ri,"'flif?'13",::l?".j1fi313"$3':??L?%ii.?qh'il8s#gHf5'fl#3iii'$"0 teiiod helbs to nedtralize thti strohger chemical.) Removg the patch as it clears the muzzle and then pull tne roo oul lrom fnd ieir. Hepeat tnis process with cleln patches weited with Bore Cleaner twice. Note:
The blue/green color indicated on the patches caused by lhe,.chemical rcaction of the Copper removet against the copper toultng.
ll signiticant blue/green discoloration is shown on the Patches, conlinue as lollows:
(4) Dry patch bore thoroughly. This requires 3 or 4 clean/dry patches. Hold a Datch wel with CobDer Remover centered at the rear opening of the Knight's SR-25 Bore Rod Gujde ald push the cnemrcal teactton ot tne L;opIEr bdtcn bomfilefely tnrough the_ bbre with the rod. Nofe the blue/green color caused bv thepull the rod o.ut from the reai. Repeat rcmov aoanst the (nDDer tourna. nb'movelire b:iicii iJit cidais tne muzzle and then rod dry with a clean rag. Wipe bore four times. ihis proceis with clean'piatches w6t with Copper Remover at least
ts)
(6) Wait 5 to 10 mlnutes lor the chemical to attack the copPer. Bod t7t Hotd a oatch wet with Shooter's Choice Firearms Bore Cleaner centered al lhe rear opening of the Knight's SFI-25 Bore pull the patch muz-zle and then it the as cleers the Remove ine-iod. tne uolJw]tn tj,1ij""r""j 5ii-riinJ;;i;h;ffi;i-dr;[-iirr;uoih ijtiJii;;#i# Hln-effiilfi,;';iod.ii"ffiiriiji"li *iii]iiiinbir*iie. iVite'in7\i-ewtiiCaoiiaused by the chemiiar reaction of the Copper reiTover ageinst the copper fouling.
when blue/green discoloralion is not indicated on the Patches, conlinue as lollows: Step Three-Keep the Bore lrom Rustlng. (1) Dry patch bore and chamber thoroUghly. This requires 3 or 4 clean/dry patches. Wipe Knight's SR-25 Bore Rod Guide dry to include its bore and ptlot gurde.
Druino the chamber rcouires removal ol the Knioht's S#8leborc Rod Guide lrom the upper receivet. lt also requies 'thd ilotted bore rod lip to be installed on the 6ore rod and cleaning patches doubled-up tor a snug tft n wgtng ne
81
(2) Double-uD on oatches in the slotted bore rod tip and apply a light coat of CLP or rust preventative oilto the chamber. Reiniei jn5'ki6tri;53n-iii 6biJnb?G-uioiin ttrei-uppniS6diver indlhe nylon bore rod ias on the end of the bore rod. (3t Hold a oatch wet with CLP or rust oreventative oll centered at lhe rear opening ot the Knight's SR-25 Bore Rod Guide :7d'filjli{Jb;;ffid;;bGtv iir'r;ilhTG b-oi;ilirh ift-rod:- nemirvelne batbn as*rt clears the-muzzle and then pull the rod out from'the rear.' Repeat tliis pnicess
wr-th
clean oiled patches twice.
Gaution
Remember to dry patch bore and chamber to remove CLP or oil before firing.
Remove bore guide, and clean remainder of rifle system.
Note: After each use of anv cleaninq brush, wipe or blot the brush clean with a dry rag. Do not dip bore or chamber brush into"solvent or CLP bottle because the brush will contaminate
it-
Note:
The SR-25 Cleaninq Kit contains a sectional cleaning rod that screws together.-tt is interchangglple.wjth lhe sectional rod reqiires a Bore Rod to.flod lip Alaptel and a Bore r6diol 'Coia t'ne-M>i SWg ;'i'd li; Mib airie.- Howeier, ttie iectioiat to aoiJeruin nciab[eitti anow iie sic[ionit'roa to accept standaid palch lt.olders and bore b'rusheb. Refer to the ' attached photograph for illustrations'of these cleaning kit components.
82
1-5.
Cleaning Kit Component InsFuctions (Navy personnel will utilize common stock s,ystem cleaning materials)
Knight's SR-25 Cteaning Kit contains a number of items intended to help you clean your ritle quickly and efficienily. This list and the"photograph on the nlxt page can be used to help identify some the lollowing components (Note: new Kit parts nol shown): Itcm
Descriotion on & P urpose
Plastic Box
Provides storaqe for cleaninq gear in rifle case or rucksack
Bore Cleaner
Shooter's Choice MC#7 Bore Cleaner & Conditioner
Q-Tips
Cleaninq aid for barrel locking recesses and barrel extension
Pioe Cleaners
Cleanino aid for oas kev and firinq pin hole
#5 Cotton Bore Patches
Patches are sized to fit bore snuggly when used with rod tip jag
#6 Chamber & Brass Brush Rod
Used with Chamber Brush and the Larqe Brass and Small Brass Bolt Carrier Brushpe
#7 Adapter for Larqe Brass Brush
Adapts the Chamber & Brass Brush Rod to the
#8 Lo. Brass Brush
Cleans carbon from the bolt recess in the bolt carrier.
#9 Sm. Brass Brush
Cleans carbon from the bolt tail piece's recess in t!!q !91!
#10 Chamber Brush
Front taoered section cleans chamber, larqer diameter bristles simultaneously clean barrel extension recess
#11 Bore Rod Assemblv--Sectional #12 Adapter, Rod to Bore Brush
Un-screws to be carried in the buttstock compartment Adapts standard threaded brushes & rod tips to sectional rod
#13 Brass Bore Brush #14 GP Tooth Brush
7.62mm Brass Bore Brush-used with Adapter & Bore Rod Double-ended Tooth Brush
#15 Bore Rod Guide & Guide Pilot
Knight's SR-25 Bore Rod Guide & Guide Pilot fits in upper receiver to help keep bore rod centered and protect bore Patches in bore for a better patch fit Used to check tiqhtness of scope ring mount nuts For TORX Head screws onlv, used to check scope ring cap screw tig!I!999 For Hex Head screws used on older model scope ring capq For Hex Head screws that secure ranqe & windaqe cams on turrets.
# 16 Nvlon Bore Rod Jaq 72" Combination Wrench
T'15 Scooe Rino Wrench
3/32" Allen Wrench 1/'16" Allen Wrench
83
L@ rqIMI
#5 Bore Batches
#8 Large Brass Bolt Carrier Brush #7 Rod Adapter
#9 Small Brass Bolt Carrier Brush
for !
Large Brass Brush
#10 Brass Chamber Brush I I
#11 Rod Assy. with Rod Tip ll Palch Holder Adapter & T-Handle
3 each Bore Rod Sections
#12 Bore Rod to Rod Tip Adapter
#12 Bore Rod to Bore Brush Adapter
# 14 General
-}
Purpose Tooth
lG"
Brass Jag
*gW..=
&
#13 Brass Bore Brush
Brush Adapter
Bore Rod Guide Pilot
# 15 Bore Rod Guide
&
Guide Pilot Assembly
84
1-6: Using the Cleaning Kit components to clean the Bolt Carrier.
Use #9 Small Brass Brush
(1) Assemble the #9 Small Brass Bolt Carrier Brush to the #6 Chamber & Brass Brush Rod and insert it through the small diameter hole inside the bolt carrier. One or two passes with the brush will generally clean carbon from the bolt's tail piece recess. Rotate rod handle clockwise to keep the brush from unscrewing.
.
I Use #8 Large Brass Brush Use #7 Adapter for Large Brass Brush
85
(2) Assemble the #B Large Brass Bolt Carrier Brush and its #7 Adapter to the #6 Chamber & Brass Brush Rod and insert it in the bolt carrier's bolt recess. Rotate rod handle clockwise 5 or 6 times to keep the brush from unscrewing and to clean carbon from the bolt recess.
E. (1) (2)
UPPER RECEIVER
Wipe inside of upper receiver with a clean rag wetted with CLP, Remove CLP with a clean dry
rag.
Repeat as necessary.
Use both ends of general purpose (GP) brush to clean arcund area where gas tube enters receiver and the charging handle tract<. A piece of string wetted with CLP can be looped around the gas tube and pulled back and forth for cleaning where the brush will not rcach. DO NOT BEND GAS TUBE with small end ofbrush.
f. (l)
BOLT GROUP (note ejector cleaning procedure on next page)
Generously coat with CLP and scrub thoroughly with GP brush. Us€ small end of GP brush in cam pin hole and doubledover pipe cleaner in firing pin recess.
(2)
S€rub extractor, cam pin, and firing pin in similar manner. Be careful brush does not dislodge extractor spring. If necessary to re-s€at extractor spring, place larger diameter end-coil into recessed hole in extractor body and press in on opposite end with the point of a round of ammunition.
(3)
Wipe pafts with clean/dry rag. Repeat cleaning with CLP and GP brush if carbon is present or as necessary to remove fouling, then wipe clean and dry.
86
2.
Hook case under extractor lip and depress ejector with thumb pressure several times.
1. Apply 1 drop of CLP to the area around the ejector.
3. Wipe away any excess or dirty CLP. Repeat steps 1 and 2 until the CLP works past the ejector and spring action is strong. Wipe away any excess CLP.
FIGURE
3-1 Ejector Cleaning Procedures 87
9.
CARRIER AND GAS KEY
(1) th!
Generously coat (inside and out) with CLP and scrub thoroughly with GP brush. Place two or three drops of CLP down gas key. Use GP brush to clean the inside surfaces where the bolt rides.
(2)
A doubled-over pipe cleaner should be us€d to scrub the straight section of $e gas key. A sbaight pipe cleaner wetted wiilr Ct-p stroutO be paisdd back and forth completely through the gas key into the inside area of the carrier,
(3) (4)
pipe cleaners. Use small end of Gp brush to scrub cam groove. Wipe all parts clean and dry with rags, pakhes, and
Clean small inside diameter of carrier with diagonal-half of a cleaning patch attached to bore rcd attention to bolt recess in carrier and gas key. DO NOT USE Q-TIPS IN GAS KEY.
h. (1)
tip.
Pay pafticular
LOWER RECEIVER GROUP
Use Gp brush wrapped with pieces of rag, pip€ cleaners, or bore rod with cleaning patches to wipe interior of lower receiver (trigger area) clean. CAUTION
Do not use wire brushes or any abrasive material to clean aluririnum surfaces.
(2) (3)
Use a pipe cleaner to clean drain hole at end of buffer tube.
(4)
If absolutely necessary, have an armorer remove hammer and trigger when detailed cleaning is required'
Clean interior of the buffer tube with a large piece of rag slightly wet with CLP attached to the end buffer tube dry with a clean rag in the same manner.
88
ofthe bore rod. Wipe
i. (1) (2)
OTHER AREAS
Other metal surfaces are cleaned with CLP and a rag or the general purpose brush, and then wip€d dry with a clean rag.
Plastic and rubber surfaces are cleaned with small amounts of water on a rag and then wiped the inside of the stock or lower receiver.
j. k, 3-6
dry.
Do not let water enter
When rifle parts are clean, lubricate for operational use as described in paragraph 3-2.
If not yet assembled, follow reassembly procedures in paragraph 2-12 through 2-14. SPECIAL OPERATOR MAINTENANCE PROCEDURES
NO|E
Speciat disasembty pocedures are th6e not normally required each time the rifle is cleaned. 7h6e pa6 should only be disassembled and cteand when their WFr fundioning is in quesb'on or susp{W of causing malfunctions. mey witt usualty tquire an Annorcrus asitbn@ or sapervrltion. They are not included in this Operato/s Manuat as an authorization, they are describd here solely to prevent damage fiom
imprcper dimssembly.
a. (1)
HANDGUARD REMOVAL-requires a strap wrench...see armorer.
With muzzle pointed away from you, hold handguard with weak hand and with shong hand-turn handguard nut to the left (counter-clockwise) with strap wrench.
(2)
Continue turning NUT witfi hand until handguard is free and lift handguard clear of barrel. Replace handguard as soon as possible to protect gas tube from being bent while handguard is removed.
(3)
Assembly is the reverse of the above except ensure that the handguard index pins enter the barrel nuts 3, 6, and 9 o'ilock position'as you begin turning the handguard nut. Use armorer's strap wrench to tighten firmly (slightly mol€ than
hand tight).
89
b.
MAGATTNE CATCH REMOVAL
NO|E An Armorer will
fu reguird to remove
the Bolt
Ad|
Efore removing Magazine ffich.
(1)
Peform disassembly of magazine catch with upper receiver removed. Observe ttle action on the magazine catch lug through the magazine well by pushing the magazine release button several times.
(2) (3)
Wth a section of cleaning rod, push the release button as far in as possible.
(4)
Depress the button again, but only with finger pressure. Continue to unscrew the lug.
The left side of the catch (magazine catch lug) now clears the left side of the receiver. Unscrew the lug to the left (counter-clockwise) 3 turns and relieve pressure on release button.
WARNING The magazine release button is spring loaded. Once the lug is fully unscrewed, the button could fly out of the receiver and hit you in the eye or be lost.
(5)
Slowly release pressure on release button as lug finally comes loose from the button. As pressure is relaxed on button, captur€ it and the spring in your hand or in a rag held over the receiver.
(6)
Assembly is the reverse of the above.
90
C.
, I I i , '
(1)
As the lug is screwed into the magazine catch button, more and more tension is applied to the catch assembly by the spring. Screw the lug into the butbn until the threaded end of the lug isjust below flush with the surface ofthe button.
(2)
Observe the range of motion the button now has on the lug by viewing tfirough the magazine well and pushing on the
button.
(3)
If the lug is screwed in too far, the lug will not clear the inside lip of the receiver. This condition will fail to release the
magazine properly.
(4)
If the lug is screwed out to far, spring tension on the button will be weak and the lug may even drop out of its recess
when the button is pressed. Both of these conditions will fail to secure the magazine in the magazine well.
i'
3-7 a. b.
i
c.
I
MAGAZINE CATCH ADJUSTMENT
CLEANTI{G THE DAY OPTrC SIGHT Use lens cleaning kit supplied with rifle or s€ope. Use only silicone-free lens cleaning paper/tissue to wipe lenses.
Remove dust, lint, dirt, and large partjcles by first blowing across the lenses. DO NOT BLOW ON LENSES IN COLD WEATHER. Then use a clean/oilfree camel's hair brush to gently sweep any debris from the lens.
To remove finger prints, oil smudget and other grime from the lens, apply lens cleaning fluid or isopropyl (rubbing) alcohol to a folded piece of lens cleaning paper. Wipe lens clean with a circular motion starting at the center of the lens and working outward.
d.
Clean outside metal surface of sight with a clean cloth.
91
3-8 a. b. If
CLEANING SCOPE MOUNTING RINGS
If so attached, install and close dust covers over lenses before cleaning s€ope.
Keep allen screw heads clear of debris and rust. Use long bristles of general purpose_ (GP) brush to keep clean and clear' rust is oi may be a problem, put a drop of CLP on each screw head, brush in and wipe off excess.
c. d. e.
Clean other areas of mounting rlngs, mounting nuts, etc., with GP brush.
Apply a light coat of CLP to exterior metal parb.
Remove and clean dust covers. Wipe control knob6 clean with a soft dry control knobs or dust covers.
3-9
USE SOLVENTS' OR CLP
on
STORAGE Ctemporary storage in unit armory, arms room, etc.)
a.
Ensure rifle is unloaded, clear and the hammer is 3-5 and 3-2 respectively.
b. c.
cloth. DO NOT OIL.
If
down. Rifle should be cleaned and lubricated as described in paragraph
possible store rifle vertically with muzzle pointed down.
Never storc ammunition or loaded magazines with the rifle !!!
92
SECTION
3-10
IV:
PREPARATION FOR SHIPMENT
PACKAGING FOR SHIPMENT
WARNING
Never ship the rifle with a round in the chamber, or ammunition in magazines' or system case.
a.
Remove any ammunition from rifle, magazines, and cases. Ensure rifle, components, and accessories are clean.
b.
System case should be packed in a fiberboard shipping box of appropriate size. Fill any voids in shipping box cushioning material (see Appendixes A and D).
wth
c.
Enclose a packing List (DD Form 1750 or equivalent) and a description of work required or nature ofmalfunction. Include your (operator's or tecn-niciant; name and phone numb€r so maintenance personnel can contact you direcfly if necessary.
d.
Close fiberboard box and seal all seams and joints with approved tape (see Appendixes A and shipping box.
3.11
MARKING FOR SHIPMENT
a. b.
Mark in accordance with MIL-STD-129. Ship via U.S. Registered Mail, Rehm receipt Requested'
93
D).
Ship only one rifle per
CHAPTER
4-L
4
AMMUNITION
AUTHORIZED AMMUNITION
WARNII{G Us€ only 7.62mm
MUSL& M118 Special Purpose Ball, M852 Match, or other authorized ammunition. with loos€ bullets, cartridges with their bullets Pushed in' caftridges longer than magazine or reloaded ammunition'
DO NOT FIRE conoded or dented cartridges, cartridges
4-2
AMMUNITION WHICH FAIIS TO FIRE
Dispose of any misfired rounds in accordance with auttlorized procedures.
4.3 a.
CARE, HANDLING, AND PRESERVATION protea ammunition from mud, sand. and moisture. If ammunition gets dirty or wet, wipe it dry with a clean/dry cloth. corrosion will not wipe clean of ammunition, properly dispose of it.
b.
If
Do not let ammunition be heated by the direct rays of the sun. If ttre ammunition is warm or hot to the touch, excessive pressure may damage the rifle or hud you. Let ammunition cool/store in the shade before use.
c.
Do not oil or grease cartridges. Oiled cartridges produce dangerously high levels of bolt thrust against the locking lugs and may damage them.
94
i
APPENDTX
A-1
A
REFERENCES
SCOPE
This Appendix lists forms, field manuals, technical manuals, tables, regulations, standards, and miscellaneous publications referenced in this manual.
'
A-2
I
rfq 3-220....Chemical, Biological and Radiological (CBR) Decontamination IM 4700-L5l L....Equipment Repair Procedures (USMC)
i I
TM 740-90-1....Adminisbative Storage of Equipment fM 750-244-7....Prccedures for Destruction of Equipment to Prevent Enemy Use TM 9-1300-200....Ammunition General TM 9-1300-206....Care and Storage ofAmmunition
A-3
I I
COMMON TABLE OF ALLOWANCES (CTA)
qfA 8-100....Army
Medical Departlent Expendable/Durable Items CIA 50-970....Expendable/Durable Items
A.4
I
on
]
o-r
' 1
TECIINICAL MANUAIS
ARMY REGULATIONS AND PAMPTILETS
PAM 25-30.,..consolidated Index of Army Publications and Blank Forms DA PAM 738-750....The Army Maintenance Management System OAMMS)
FrELD MANUALS
FM 3-87....Nuclear, Biological and Chemical (NBC) Recon and Decontamination Operations FM 21-11....FiBt Aid for Soldiers FM 21-40.,.,.N8C (Nuclear, Biological and Chemical) Defense FMFM 1-3B.....Sniping (U.S. Marine Corps Publication)
95
A-6 fC
TRAINING CIRCULAR
23-L4.."..Sniper Training and Employment
A-7
FORMS
DA Form 2028.....Recommended Changes to Publications and Blank Forms DD Form 1750.....Packing List SF 368.....Quality Deficiency Report
A.8
MISCELLANEOUS
MCO 8020.1....Handling, Transportation, Storage, Reclassification, and Disposal of Class V (W) Material (USMC) NAVMC 1055BA.....Weapon Record Book, Part II (USMC) MIL-STD- 129" "... Military Standard-Masking for Shipment and Storage PPP-B-636.....Federal Specifications - Boxes, Shipping, Fiberboard PPP-C-B43.....Federal Specification - Cushioning Material PPP-C-1842.....Federal Specification - Cushioning Material PPP-T-60..,..Federal Specification - Tape, Packaging, Waterproof A-A-1683.....Federal Specification - Tape, Packaging, Waterproof TB 43-0196.....Inspection and Certification of Gages - Small Arms
96
APPENDIX
B-1
TOOLS
a.
T-Handle Torque Wrench.
B
DESCRIPTION OF TOOL USAGE
(Optional Accessory used to torque day optic mounting nuts to 65 in. lbs.)
b.
Socket, Socket Wrench, 1/2". (Optional Accessory used with T-Handle Wrench to torque day optic mounting nuts)
c.
Key, Socket Head Screw 1116".
(Optional Accessory used for day optic sight elevation and windage dial set screws)
d.
Wrench, Combination, Box and Open
, L12".
See page 98.
(Optional Accessory, use box end to remove day optic sight and initial or field tightening of mounting nuts)
e.
Key, T-15
Tox
Head or T-10, or; Key, Socket Head Screw 3132". See Pages 99 and 100.
(Optional Accessory used for day optic sight ring cap screws, all three wrenches included in Cleaning Kit)
97
TO REMOUNT KMC SCOPE RINGS WHEN THE 65-|NCH POUND T.HANDLE TOROUE WRENCH IS NOT AVAILABLE, USE THE I/2-INCH COMBINAIION WRENCH IN THE CLEANING KIT AS FOLLOWS:
I.
MOUNT RINGS AND SCOPE ASSY. ON THE RAIL IN THE DESIRED POSITION, AND LOOSELY TIGHTEN THE HEX NUTS WTH YOUR FINGERS,
2. WTH THE NUTS SLIGHTLY LOOSE, POSITION CLAMPS AND PUSH THE SCOPE AS FAR FORWARD AS THE RECOIL GROOVES ALLOW. 3.
WHILE HOLDING THE SCOPE FORWARD, FINGER TIGHTEN THE FRONT HEX NUTAS MUCH AS POSSIBLE. REPEAT FOR THE REAR HEX NUI.
4. WITH THE I/2-INCH COMBO WRENCH IN THE CTEANING KIT, TIGHTEN THE FRONT HEX NUT AN ADDITIONAT 90 DEGREES. REPEAI FOR lHE REAR HEX NUT, 5.
THIS FIETD MOUNTING PROCEDURE
WLL
BE CLOSE TO THE DESIRED
TOROUE VATUE, AND REPEAT A GOOD ZERO IF PERFORMED EXACTLY THE SAME EACH IIME,
Use for:
Scope Mounl Nuts
Figure B-1 Use of Vz" Combination Wrench with Scope Ring Nuts
98
3132" He Screw
T-
I 5 Torx
Screw
a(o a = @
The SR-25 Cleoning Kit contoins 3/32" Hex Heod ond T-15 Torx Heod Screw
T-10 Torx Size also used.
wrenches.
On o weekly bosis, check the tightness of lhe scope ring cop screws wilh the correct wrench.
a9
However, do not use the wrench's long orm to check the screw lighlness.
lo feel if the screw you lf the wrenches long lose. use orm, you will move the screw ond Use the short orm
is
chonge the lorque setting from the foctory.
**rr* cAUTloN **** Using the wrench's long orm moy overlighten ond breqk the screws,
Figure B-2 Use of Hex or Torx Wrench with Scope Ring Caps
99
lnslollScope Ring Boses lo Receiver
Push boses forword
os you linger lighlen
<-
<_
Ii2-inch hex bose nul
L
2. Remove Ring Cops ond cleon owoy ony oil or did from lhe scope ond ring moling surfoces. Position scope in boses os shown,
lnstoll Scope Ring Boses lo Receiver Roil finger tight. The forword ring should be positioned in the second groove from lhe fronl, ond lhe reor ring positioned in lhe thirleenlh groove. Ensure gops ore even on bolh sides.
lnslollRing Cops lo Boses
3. The scope ond ring posilions shown obove should ollow for the oppropriole eye relief. However, subsequenl re-posilioning moy be required lo occommodole ditferent shoolers or firing positions.
3132" Hex
or
@@
T-l Torque Cop Screws lo
4. lnslolllhe ring cops to lhe boses wilh lhe screws provided wilh the rings. While only finger lighlening lhe cop screws, ensure lhol lhe gop belween eoch cop ond its bose is equolon bolh sides of lhe ring.
Size also
5. Torque the cop screws lo l3-lnch/Pounds with o properly colibroled torque driver while following lhe numbered potlern shown to the righl. Ensure the gops ore equolofter tightening. 6. Torque l/2-inch hex bose nuls lo 65-lnch/Pounds wilh o properly
colibroled lorque wrench.
Figure B-3 Use of Tools for Scope Mounting
100
l3-lnch/Lbs in the numbered tighlening Sequence shown.
APPENDIX
C
SYSTEM ITEMS THAT MAY APPLY TO YOUR RIFLE
C-l
GENERAL The operator is authorized to order the following optional system accessories:
NO.
FSCM/CAGL
PART
L9240 L9204 19204
7r4L245 8448462
r 2 3 4
s
6 7 B 9 10 11 t2
t9204 s57L9 92674 64959
t9204 3A703 3A703 19204 3A703
NO.
5564174 8436793 AW2 8A27077-4 G243079-6 s019316 96092 96093 Lt686237 95095
844875I
13
L4 ls 16
81348 81348 81348
17 18 19 20 21
81348 3A703 58s36 3A703 3A703
GG-A-616 NNN-P-40
L-B-56A H-B-118
96401 A-A-1404 96059 96083
NSN:
NOMENCLATURE
1005-00-714-1245 Sling, Small Arms, Leather 1005-00-494-6602 Brush, Cleaning, GP 1005-00-556-4174 Brush, Bore (.30" 17.62mm) 9150-00-BB9-3s22 Oil Bottle LlI6" Key, Socket Head Screw 5120-00-198-5398 3132" Key, Socket Head Screw 5120-00-242-74L0 5120-00-228-9506 Wrench, Box and Open 1/2" 1005-00-28B-3565 Swabs, Cleaning Small Arms 1005-01-271-3856 T-Handle Section 1005-01-271-3861 Cleaning Rod Section, 4 ea. 1005-00-937-2250 Swab Holder Adapter, Bore Brush to Rod Section 1005-01-27L-3857 (converts 8-36 to 8-32) Case, Accessory, SA 100s-00-403-5804 (Rod sections & T-Handle) 6s15-00-303-82s0 Applicator, (Q-Tips) (Cleaning 6640-00-663-0832 Tissue) Paper, Lens Bottle (for containing Isopropyl 8125-00-824-90s8 Alcohol) (Cleaning 8020-00-224-80L0 Brush) Brush, Artists 100s-01-260-2661 Case, Lens Cleaning s120-00-227-6702 Socket, Socket Wrench 1/2" 1005-01-260-2645 Wrench Torque T-Handle 100s-01-260-2650 Day Optic Sight Ring Screws
101
APPENDIX D EXPENDABLE/DURABLE SUPPLIES AND ]'IATERIAIS LIST
D-l
SCOPE
This appendix lists expendable and durable supplies and materials that the operator will need to operate and maintain the SR-25 Sniper Rifle System. This listing is for informational purpos€s so all personnel will be aware of the items available to support tfie user. It is not authorization to requisition the listed items. These items are authorized to you by CfA 50-970, Expendable/Durable Items (except Medical, Class V, Repair Parts, and Heraldic ltems), or CTA 8-100, Army Medical Depadment Expendable/Durable It€ms.
D.2
EXPLAI{ATION
a,
LEVEL. This column identifies the lowest level of maintenance that requires the listed items: C - Op€rator/Crew F - Intermediate Direct Support Maintenance
b.
U/M (Unit of Measure). Indicates the measure used in performing the actual maintenan@ function. This measure is expressed bya two-character alphabetjcal abbreviation (e.9., ea.. in., pr.). ffthe U/M differs from ttre unit of issue, requisition
tie
lowest unit of issue that satisfies your requiremenb. EXPENDABLE I DURABLE SUPPLIES AND MATERIALS LIST
ITEM NO. 1
LEVEL
c
DESCRIPTION
NSN
6810-00-983-8ss1
ALCOHO!-, ISOPROPYL, (Cleaning Fluid) (81348) TT1735, 1 qt. can
U/M QT
APPLTCATOR (Q-TIPS) 2
c
6s1s-00-303-8250
(81348) GG-A-616 100 per pk
102
EA
EXPENDABLE
ITEM NO.
/ DURABLE
SUPPLIES AND MATERIALS LIST DESCRIPTION
u/M
BOTTLE (FOR CONTAINING ISOPROPYL ALCOHOL), (81348) L-B-56A, 1 oz. bottle
EA
NSN
LEVEL
3
c
4
F
8115-01-015-27t0
BOX, SHIPPING (81348) PPP-B-636 , 12 in. x 12 in. x 48 in. 10 each
BL
c
8020-00-224-8010
BRUSH, ARTIST (Lens Cleaning), (81348) H-B-118
EA
c
1005-00-556-4174
BRUSH, BORE (.30"17.62mffi), (19204) 5564L74
EA
c
TBD
BRUSH, CHAMBER (SR-25)
EA
c
1005-00-494-6602
BRUSH, CLEANING, SMALL ARMS (19204) 8448462 (Double End Tooth Brush)
EA
c
9150-01-102-t473
CLEANER, LUBRICANT, PRESERVATIVE (CLP)
oz
(81349) MIL-L-63460, Llz oz. bottle
oz
10
B12s-00-824-9058
11
F
8135-01-087-3605
cusHroNrNc MATERIAL (B 1348) PPP-C-1842,325 in. x 12 in. x 1/4 in.
RO
t2
F
B13s-00-913-3514
CUSHIoNING MATERIAL (81348) PPP-C-843, 100 ft. x 6 in. x 3/4 in.
RO
103
EXPENDABLE
/ DURABLE SUPPLIES AND MATERIALS
LIST
ITEM NO. 13
L4
LEVEL
c
c
DESCRIPTION
NSN 9150-00-292-9689
9150-00-935-6597 9150-00-889-3522
LUBRTCATING OIL, AR.CTIC WEAPONS (LAW) (81349), MIL-L-14107, I qt. can
LUBRICATING OIL, WEAPONS (LSA), SEMI-FLUID (81349) MIL-L-46000 2 oz. plastic bottle 4 oz. plastic bottle
U/M QT
OZ
oz
PAPER, LENS
15
16
17
6640-00-663-0832
(81348) NNN-P-40 (Cleaning Tissues), 50 sheet Pk.
7920-00-205-1171
RAG, WIPING, (58536) A-A-531, 50 lb. bl.
c
c c
100s-00-288-356s
swAB, SMALL ARMS CLEANING (2.5" X 2.5") (L9204) 5019316, 200 per bl. (.30"17.62mm)
7s10-00-297-66ss
TAPE, PRESSURE SENSITIVE, PAPERBACK, WATER-RESISTANT (58536) A-A-1683, 2 in. wide,I20 yd. roll
1B
7510-00-074-4952 19
F
TAPE, PRESSURE SENSITIVE, CLOTH BACK, WATER-RESISTANT (81348) PPP-T-60, 2 in. wide, 60 yd. roll
104
EA
LB
EA
YD
YD
APPENDIX E
coRRosroN
PREVENTIOT{ At{D CONTROL (CPC)
The supplies and materials required for Corrosion Prevention Control (CPC) are listed within Appendix D, Expendable/Durable Supplies and Materials List. Preventive Maintenance Checks and services are in Chapter 2, Section IV (see Paragraph 2-20).
Rifle Crc is addressed in Chapter 2, Section VI: Operation Under AdveFe Conditions (see Paragraphs 2-25 through 2-28), and the Lubrication Guide in Paragraph 3-2 as well as Paragraph 3-3: General.
Ammunition cPc is addressed in chapter 4. of ordnance equipment and other material is a matter of continuing concern for all personnel. It is important that any cormsion problems with your Snip€r Rifle System be reported so that the problem can be conected and improvements can be made to prevent the problem in the future. Although corrosion or "rusg' is commonly associated with the suface deterioration of metals, it can also include the deterioration of other materials such as rubber and plastic items. However, for the purposes of CpC, corrosion also includes unusual cracking, softening, swelling, or breaking of items made from these materials. CPC
If corrosion or premature failure of components is identified, it should b€ reported using Standard Form 368, Quality Deflciency Report. Use "key words" such as "corrosion", "rust", "deterioration", or "cracking" to ensure your problem information is identified as a Crc problem.
The form should be submitted to:
KNIGHT'S MANUFACTURING COMPANY 701 Columbia Blvd. Titusville, Florida 32780 e-mail:
[email protected]
Notet U.S. Navy peFonnel will use the following point of contact: Naval Surface Warfarc Center (Code 4081), 3OO Highway 35i, Crane IN 4r522-5OOl (attn: Mr. Terry O'Brian, Commercial Telephone (812) 854'5831 or Fax (812) 854-1044,
105
Knight's Armament Company
W6E4 Won /,fu ea aa
"'rE
t/e
(&re, ,
,
tle k,KAf an// dn,
701 Columbia Blvd. Titusville, Florid a 327 80 Phone: (321) 607-9900 Fax: (321) 268 -1498 €-mail address:
[email protected]
