17722702-MK-18-OM

SW370-A3-OPI-010

OPERATOR’S MANUAL for CARBINE, 5.56MM MK 18 MOD 0 NSN 1005-01-527-2288

Distribution Statement D: Distribution authorized to the DoD and DoD contractors only; due to specific Authority (Public Law 90-629-ARMS EXPORT CONTROL ACT AND DoD 5230.25 WITHHOLDING OF); 1 April 2005. Other requests shall be referred to Commander, Code 4081 NSWC, 300 Highway 361, Crane, Indiana 47522-5001. Destruction Notice: Destroy by any method that will prevent disclosure of contents or reconstruction of this document.

SW370-A3-OPI-010

WARNINGS 1. Be sure to clear weapon before disassembling, cleaning, inspecting, transporting or storing. 2. Stay clear of muzzle and always keep weapon pointed downrange. 3.

Keep clear of muzzle.

4.

Keep safety on until ready to fire.

5. Never open the weapon’s action if the barrel is extremely hot and you suspect there is a live round in chamber. 6. Always look into chamber to ensure it is empty after clearing weapon.

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7. When ammunition and weapon are exposed to the sun on a hot day, a cook-off can occur within 150 rounds of continuous firing. 8. Do not allow cartridge primer to hit any hard surface or it may fire. Dispose of live rounds appropriately. 9. bly.

Ensure that the action is closed before beginning disassem-

10. All personnel shall wear approved single hearing protection devices during training exercises. 11.

Ensure there are no obstructions in the barrel.

12. If a noticeable difference in sound or recoil is experienced, STOP FIRING. Either condition could indicate an incomplete powder burn and/or a bullet stuck in the bore. Retract bolt slowly and remove fired cartridge case. Clear weapon and check for unburned ii

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powder grains in the receiver or bore and for a bullet stuck in the bore. Remove unburned powder or bullet from bore before resuming firing. If the bullet is stuck in bore, return the weapon to the armory. 13. If your weapon stops firing with a live round in the chamber of a hot barrel, remove the round fast. However, if you cannot remove it within 10 seconds, remove magazine and wait 15 minutes with the weapon pointing in a safe direction. This way you won’t get hurt by possible round cooking off. Regardless, keep your face away from the ejection port while clearing a hot chamber. 14. If an audible ‘Pop’ or reduced RECOIL is experienced during firing, immediately CEASE FIRE. 15. With the bolt carrier assembly locked to the rear or in its forward position. If the weapon is dropped or jarred with a loaded magazine in place, it could chamber a round. iii

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16.

Do not load with a hot chamber.

17.

Do not fire if water is present in the barrel.

18.

Do not interchange bolts between weapons.

19. Before starting functional check, be sure to clear the weapon. DO NOT squeeze the trigger until the weapon has been cleared. Inspect the chamber to ensure that it is empty and no ammunition is in position to be chambered. 20. To be considered SAFE before disassembly, cleaning, inspecting, transporting, or storing, the weapon must be cleared. 21. Before starting an inspection, be sure to clear the weapon. DO NOT squeeze the trigger until the weapon has been cleared. Inspect the chamber to ensure that it is empty and no ammunition is

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in position to be chambered. Do not keep the ammunition near work area. 22. Before starting an inspection, be sure to clear the weapon. Do not keep live ammunition near work area. 23. Your weapon is now loaded. Ensure it is pointed in a SAFE direction. 24. Be sure the cam pin is installed in the carrier assembly. If cam pin is not installed, your weapon can still fire and will explode. 25. DO NOT FIRE: Seriously corroded ammunition, dented cartridges, cartridges with loose bullets, cartridges exposed to extreme heat (135oF) until they have cooled, and cartridges with bullet pushed in (short rounds)

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CAUTIONS Do not interchange bolt, gas cylinder, and trigger group with other weapons. Be careful not to accidently fire your weapon when inserting gloved fingers into trigger area. Disassemble using steps m through q only when dirty or damaged. Do not use wire brush or any type of abrasive material to clean aluminum surfaces. Selector lever must be on SAFE or SEMI before closing upper receiver. Do not continue to adjust windage and elevation mechanisms if resistance is encountered. This could result in damage to equipment. Never ‘ride’ the charging handle. Let it go forward on its own. vi

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Do not use a screw driver or any other tool when removing the handguards. Doing so may damage the handguard and/or ship ring. If the upper RIS is removed without first loosening the screw at the muzzle end, components may be damaged. Avoid storing and transporting the VBLII with batteries installed. This reduces the chance of accidental activation and equipment damage due to heat build-up and battery leakage.

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Operator’s Manual for CARBINE, 5.56MM MK 18 MOD 0 NSN: 1005-01-527-2288 Distribution Statement D: Distribution authorized to DoD and DoD contractors only; due to specific Authority (PUBLIC LAW 90-629-ARMS EXPORT CONTROL ACT AND DoD 5230-25 WITHHOLDING OF) 1 April 2005. Other requests shall be referred to Commander, Code 4081 NAVSURFWARCENDIV, 300 Highway 361, Crane, Indiana 47522-5001. Destruction Notice: Destroy by any method that will prevent disclosure of contents or reconstruction of this document.

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REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS Errors in this publication or recommendations for its improvement shall be sent to: COMMANDER Crane Division Naval Surface Warfare Center Attn: Code 4081, Bldg 2521 300 Highway 361 Crane, Indiana 47522

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Table of Contents WARNINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-i CAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-vi CHAPTER 1 SECTION I. 1-1. 1-2.

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 GENERAL INFORMATION. . . . . . . . . . . . . . . . . . . . . 1-1 SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 CORROSION, PREVENTION, AND CONTROL (CPC).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 1-3. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR). . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 SECTION II. EQUIPMENT DESCRIPTION. . . . . . . . . . . . . . . . . . . 1-5 1-4. EQUIPMENT CHARACTERISTICS, CAPABILITIES AND FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 1-5. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 1-6. EQUIPMENT DATA.. . . . . . . . . . . . . . . . . . . . . . . . . 1-10 xi

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CHAPTER 2 OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . . 2-1 SECTION I. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS).2-1 2-1. PMCS PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . . 2-1 SECTION II. OPERATION UNDER USUAL CONDITIONS. . . . . . 2-16 2-2. OPERATION OF THE WEAPON. . . . . . . . . . . . . . . 2-16 2-3. INSTALL MAGAZINE. . . . . . . . . . . . . . . . . . . . . . . . 2-46 SECTION III. OPERATION UNDER UNUSUAL CONDITIONS.2-46 2-4. ENVIRONMENT/WEATHER. . . . . . . . . . . . . . . . . . . 2-46 CHAPTER 3 MAINTENANCE INSTRUCTIONS . . . . . . . . . . . . . . . 3-1 SECTION I. INSPECTION AND LUBRICATION. . . . . . . . . . . . . . . 3-1 3-1. INSPECTION GUIDE. . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3-2. LUBRICATION GUIDE. . . . . . . . . . . . . . . . . . . . . . . . 3-2 SECTION II. TROUBLESHOOTING PROCEDURES. . . . . . . . . . 3-13 3-3. TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . 3-13 3-4. DISASSEMBLY PROCEDURES ( FIELD STRIPPING).. . . . . . . . . . . . . . . . . . . . . . . . . 3-19 3-5. CLEANING, INSPECTION, AND REPAIRS. . . . . . . 3-32 xii

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SECTION III. INSPECTION INSTRUCTIONS.3-41 3-6. REASSEMBLY PROCEDURES (FROM FIELD STRIP). . . . . . . . . . . . . . . . . . . . . . . . 3-48 3-7. FUNCTION CHECK. . . . . . . . . . . . . . . . . . . . . . . . . 3-60 CHAPTER 4

MAINTENANCE OF AUXILIARY EQUIPMENT (ACCESSORIES) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 SECTION I. INSPECTION AND LUBRICATION. . . . . . . . . . . . . . . 4-1 4-1. VERTICAL HANDGRIP. . . . . . . . . . . . . . . . . . . . . . . . 4-1 4-2. RAIL INTERFACE SYSTEM. . . . . . . . . . . . . . . . . . . . 4-7 4-3. ENHANCED COMBAT OPTICAL SIGHT-NAVY.. . . 4-13 4-4. VISIBLE BRIGHT LIGHT II. . . . . . . . . . . . . . . . . . . . 4-24

CHAPTER 5 5-1.

AMMUNITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 AMMUNITION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

APPENDIX A A-1. A-2. A-3.

BASIC ISSUE ITEMS (BII) LIST . . . . . . . . . . . . . . . . A-1 SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 BASIC ISSUE ITEMS (BII) LIST. . . . . . . . . . . . . . . . . A-1 EXPLANATION OF COLUMNS. . . . . . . . . . . . . . . . . A-2 xiii

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A-3.

SECTION II. BASIC ISSUE ITEMS. . . . . . . . . . . . . . A-3

APPENDIX B ADDITIONAL AUTHORIZED LIST . . . . . . . . . . . . . . B-1 SECTION I. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 B-1. SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 B-2. GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1 B-3. EXPLANATION OF LISTING. . . . . . . . . . . . . . . . . . . B-2 B-4. EXPLANATION OF COLUMNS. . . . . . . . . . . . . . . . . B-2 SECTION II. ADDITIONAL ITEMS LIST. . . . . . . . . . . . . . . . . . . . . B-4 APPENDIX C

EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 SECTION I. INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 C-1. SCOPE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1 C-2. EXPLANATION OF COLUMNS. . . . . . . . . . . . . . . . . C-1

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CHAPTER 1 INTRODUCTION Section I. General Information.

NSN: 1005-01-527-2288

1-1

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Figure 1-1. Carbine, 5.56MM MK 18 MOD 0. 1-1.

SCOPE. a. Type of Manual: Operator’s Manual.

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b. Model number and equipment name: Carbine, 5.56MM MK 18 MOD 0. c. Purpose of Equipment: The purpose of the carbine is to provide personnel an offensive/defensive capability to engage enemy targets. The MIL-STD-1913 Rails allows the operator the capability to mount various accessories on the MK 18 Carbine. 1-2.

CORROSION, PREVENTION, AND CONTROL (CPC).

CPC of material is a continuing concern. It is important any corrosion issues be reported so that corrections/improvements can be made. While corrosion is typically associated with rusting metals, it can also include deterioration of other materials such as rubber or plastic. Unusual cracking, softening, swelling, or breaking of these materials may be a result of corrosion.

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1-3. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR). If your carbines or this manual need improvement, let us know. You, as the user, 5.56MM MK 18 MOD 0, are the primary source of information on what needs improvement. Let us know what improvements in design or performance are needed. A reply will be furnished directly to you. Report to: Commander Crane Division Naval Surface Warfare Center Attn: Code 4081, Bldg. 2521 300 Highway 361 Crane, Indiana 47522-5001 or use NSWC Code 4081 Form SMW-ECP-A and fill in blocks 1-6 and submit to [email protected]. 1-4

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Section II. Equipment Description. 1-4. EQUIPMENT CHARACTERISTICS, CAPABILITIES AND FEATURES. a. Characteristics. The 5.56MM MK 18 MOD 0 Carbine is a lightweight air-cooled, gas operated, magazine fed weapon used primarily for semi-automatic fire and automatic fire. b. Capabilities. The MK 18 MOD 0 Carbine will be used to engage targets at ranges out to 500 meters for point target and 600 meters for an area target. The MK 18 MOD 0 Carbine deliberately capitalizes on prior shooting and maintenance skills of individuals proficient with M16 type carbines. The MK 18 MOD 0 Carbine is equipped with multiple MIL-STD-1913 rails to 1-5

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facilitate the mounting of various accessories for tailoring to operational requirements. c.

Features.

The MK 18 MOD 0 consists of a Close Quarter Battle upper Receiver, vertical handgrip, sloping cheek weld buttstock, magazine and compensator. The Close Quarter Battle Receiver (CQBR) is a shortened variant of the M4A1 Carbine upper receiver with a barrel length of 10.3 inches. The CQBR provides the individual soldier operating in close quarters the capability to engage targets with accurate lethal fire. The Carbine may also be provided with optional accessories that might include M68 Aim Point, and Visible Bright Light. 1-5.

LOCATION AND DESCRIPTION OF MAJOR COMPONENTS. 1-6

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Figure 1-2. 5.56MM MK 18 MOD 0 Carbine Major Components.

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a. Charging Handle Assembly (1).

Provides initial charging of the weapon. The charging handle locks in the forward position during sustained fire to prevent injury to the operator.

b. Backup Iron Sight (2).

Backup iron sight is adjustable for both windage and elevation.

c. Bolt and Bolt Carrier Assembly (3).

Provides stripping, chambering, locking, firing, extraction, and ejection of cartridges using the drive springs and projectile propelling gases for power.

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d. Upper Receiver and Barrel Assembly (4).

Provides support for the bolt carrier assembly. The barrel chambers the cartridge for firing and directs the projectile.

e. Vertical Grip (5).

The vertical handgrip attaches to the rail system and provides added support and control for firing and quicker handling with additional components attached to the weapon.

f.

Holds cartridges ready for feeding and provides a guide for positioning cartridges for stripping. Provides quick reload capabilities for sustained firing.

Cartridge Magazine (6).

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g. Lower Receiver and Buttstock Assembly (7).

Provides firing control for the weapon. Provides optional storage tubes for basic cleaning materials and/or batteries.

h. Sling Mounts (8)

Provides sling to be clipped to the weapon

1-6.

EQUIPMENT DATA. a. Caliber

5.56MM

b. Weight W/30 rd (loaded) magazine.

7.0 lbs. 10 oz

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c.

Length. • Overall Weapon Stock Extended • Length of Barrel Stock Collapsed

30.0 in. 26.75 in.

d. Ballistics. • Muzzle velocity • Chamber pressure • Cyclic Rate of Fire • Fire Selector

2970 fps 52,000 psi 700-970 rpm(approx) SAFE, SEMI, AUTO

e. Maximum Effective Rates of Fire. • Semi • Auto • Sustained Rate of Fire

45 rpm 90 rpm 12/15 rpm

f.

Maximum Effective Range • Individual/point targets • Area Targets • maximum Range 1-11/(1-12 Blank)

500 m 600 m 3600 m

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CHAPTER 2 OPERATING INSTRUCTIONS Section I. Preventive Maintenance Checks and Services (PMCS). 2-1.

PMCS PROCEDURES. a. General.

To ensure the readiness of your weapon, perform the preventive maintenance procedures in accordance with Table 2-1 on page 2-5 to 215, prior to each mission. Preventive maintenance procedures include inspection, cleaning, and performance of the checkout procedures. b. Explanation of Table Entries.

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(1) Item Number Column. Numbers in this column are for references. When completing Equipment Inspection and Maintenance Worksheet, include the item number for the check/service indicating a fault. Item numbers also appear in the order that you must do checks and services for the intervals listed. (2) Interval Column. This column tells you when you must do the procedure in the procedure column. BEFORE (B) procedures must be done before you operate or use the equipment for its intended mission. DURING (D) procedures must be done during the time you are operating or using the equipment for its intended mission. AFTER (A) procedures must be done immediately after you have operated or used the equipment. (3) Item to be Checked or Service Column. This column provides the location and the time to be checked or serviced. The item location is underlined.

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(4) Procedure Column. This column gives the procedure you must do to check or service the item listed in the Check/Service column to know if the equipment is ready or available for its intended mission or for operation. You must do the procedure at the time stated in the interval column. (5) “Equipment Not Ready/Available If:” Column. Information in this column tells you what faults will keep your equipment from being capable of performing its primary mission. If you make check and service procedures that show faults listed in this column, do not operate the equipment. Follow standard operating procedures for maintaining the equipment or reporting equipment failure. WARNING Before starting an inspection, be sure to clear the weapon. DO NOT squeeze the trigger until the weapon has been cleared. Inspect the chamber to ensure that it

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is empty and no ammunition is in position to be chambered. Do not keep the ammunition near work area. NOTE An inactive weapon is a weapon, whether assigned or not assigned to an individual, that is stored in an arms room for a period of 90 days. Performance of normal cleaning (PMCS) of an inactive weapon will be performed every 90 days.

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WARNING Before starting an inspection be sure to clear the weapon. Do not keep live ammunition near work area. Table 2-1: Preventive Maintenance Checks and Services. Item

Interval

Item to be Checked or Serviced

1

Before

Magazine

Procedure Magazine slips easily into the magazine well and locks in place.

2-5

Equipment not Ready/Available If: Magazine is distorted or is hard to sear and/or doesn’t lock in magazine well.

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Table 2-1: Preventive Maintenance Checks and Services. (Cont’d) Item

Interval

1 (Cont’d)

Before

2

Before


Upper ReceiverBarrel

Procedure

Equipment not Ready/Available If:

Magazine follower has spring tension and moves easily inside of magazine.

Magazine follower is stuck or has weak spring tension.

Check for barrel looseness (using hand pressure only).

Barrel is loose enough to be moved by hand.

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Interval

3

Before


Procedure

Weapon Move front and Sight (Zero rear sight to make Adjustment) sure they can be adjusted. Return sights to zero setting on your weapon.

2-7

Equipment not Ready/Available If: If the sights are damaged, missing, or can’t be adjusted.

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Interval

4

Before


Procedure

Magazine Insert magazine Catch (Func- into well. The tion) magazine catch should hold the magazine in place

2-8

Equipment not Ready/Available If: If the magazine catch will not retain or release the magazine.

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Table 2-1: Preventive Maintenance Checks and Services. (Cont’d) Item 4 (Cont’d)

Interval


Procedure Pressing the magazine catch button should release the magazine. To adjust the magazine catch, use cleaning rod to press in on the magazine catch

2-9


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Table 2-1: Preventive Maintenance Checks and Services. (Cont’d) Item 4 (Cont’d)

Interval


Procedure button until the left side of the magazine catch sticks out beyond the receiver. To tighten, turn the magazine catch clockwise; to loosen, turn it counterclockwise.

2-10


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Interval

5

Before


Procedure

Visual Look the weapon inspection of over for missing or weapon. damaged parts. Report missing or damaged parts to armorer.

2-11

Equipment not Ready/Available If: Parts are missing or damaged to a point of being unserviceable.

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Interval

6

During


Procedure


Periodic Periodically check If foreign material Inspection of weapon to make is in bore. Weapon sure it’s clean and there is no foreign material in bore. If foreign material is in bore, clean bore.

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Interval

7

During


Procedure

Maintenance performed during Firing Operations

Clean and lubricate weapon after firing approximately 200 rounds of ammunition or at the end of the day.

2-13


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Interval

8

After


Procedure

Maintenance of weapon and Equipment.


If parts are missDisassemble ing or damaged. weapon. Clean and lubricate. Disassemble magazine. Clean and lubricate. Report all damaged or missing parts to unit armorer.

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Interval

9

Before/ After


Procedure Perform functional check.

2-15

Equipment not Ready/Available If: If weapon fails function check.

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Section II. Operation Under Usual Conditions. 2-2.

OPERATION OF THE WEAPON. WARNING With the bolt carrier assembly locked to the rear or in its forward position. If the weapon is dropped or jarred with a loaded magazine in place, it could chamber a round. a. Use of Selector Lever.

(1) SAFE. Weapon will not fire. Selector Lever cannot be on SAFE unless weapon is cocked. Always place on SAFE when loaded. (2) SEMI. Weapon will fire one round each time the trigger is pulled.

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(3) AUTO. Weapon will continue to fire as long as the trigger is pulled. NOTE Magazine may be inserted into weapon with bolt assembly open or closed. b. Loading for Semi Auto Fire and Chambering a Round. (1) With hammer cocked placed selector lever on SAFE. Point muzzle in safe direction.

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(2) Open bolt and check chamber. Make sure it is clear. Press bottom of bolt catch and allow bolt to move forward until it engages bolt catch. Return charging handle to full forward position.

(3) Push upward until magazine catch engages and holds magazine.

(4) Tap upward to make sure it is seated right.

Figure 2-1. Loading Magazine. 2-18

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WARNING Your weapon is now loaded. Ensure it is pointed in a SAFE direction.

(5) Depress upper portion of bolt catch. Bolt should go forward.

(6) Tap forward assist to ensure bolt is fully forward and locked.

Figure 2-2. Allow Bolt to Go Forward. 2-19

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(7) Chambering a round from the bolt closed position; with magazine inserted, pull charging handle fully rearward.

(8) Release the charging handle.

Figure 2-3. Chamber Round from Bolt Closed Position.

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CAUTION Never ‘ride’ the charging handle. Let it go forward on its own.

(9) Tap forward assist to ensure bolt is fully forward and locked. Figure 2-4. Tap Forward Assist.

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c.

Clearing Weapon. WARNING To be considered SAFE before disassembly, cleaning, inspecting, transporting, or storing, the weapon must be cleared.

(1) Point weapon in a safe direction. Place selector lever on SAFE. If weapon is not cocked, lever cannot be pointed toward SAFE.

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Figure 2-5. Remove Cartridge Magazine. (2) Remove cartridge magazine by depressing magazine catch button and pulling cartridge magazine down.

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Figure 2-6. Lock Bolt to Rear. (3) To lock bolt open, pull charging handle rearward. Press bottom of bolt catch and allow bolt to move forward until it engages bolt catch. Return charging handle to full forward position. Ensure to, place selector lever on SAFE.

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d. 25 Meter Zero Procedure. (1) Adjustable rear sight has two apertures for range.

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(a) SHORT RANGE OR AT NIGHT - This “larger aperture is used for 0-200 meters range. As shown, the sight is set for 0-200 meters. This larger aperture is only used when the rear sight is all the way down. In other words, the 300meter mark is aligned with the mark on the left side of the receiver. (b) NORMAL RANGE - The aperture is unmarked and used for most firing situation. it is used in conjunction with the elevation knob for 300, 400, 500, 600-meter targets.

Figure 2-7. Backup Iron Sight. 2-26

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(2) Battlesight Zero. When battlesights are on your weapon. (a) The front sight post and rear sight windage knob are adjusted so you can hit your point of aim at 300 meters. (b) The unmarked aperture is in the UP position. (c) The 300 meter mark is aligned with the mark on the left side of the receiver. This will read 6/3.

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Figure 2-8. Windage Knob Set at 300 Meters. (3) Battlesight Zeroing Procedures. (a) During zeroing procedures, only the front sight post and windage knob are adjusted to move the strike of the bullet on the target. (b) Detailed zeroing procedures are on the target and the following pages. 2-28

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NOTE FRONT SIGHT - The front sight post is moved up or down when zeroing the weapon. Once the weapon is zeroed, the front sight post should not be moved. (c) To adjust elevation, depress detent and rotate post. To raise strike of bullet, rotate post in the direction of arrow marked UP. Reverse the direction of rotation to lower strike of bullet. Each graduation (notch) moves the point of impact of bullet as indicated.

Figure 2-9. Adjust Front Sight Post. 2-29

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(d) FOR ELEVATION (per click) IMPACT 1.2 cm (1/2 in.) 4.8 cm (1 7/8 in.) 9.6 cm (3 3/4 in.)

DISTANCE 25 meters 100 meters 200 meters

(e) FOR WINDAGE KNOB (per click) IMPACT 0.5 cm (3/16 in.) 1.9 cm (3/4 in.) 4.8 cm (1 1/2 in.) 5.7 cm (2 1/4 in.) 7.6 cm (3 in.) 9.5 cm (3 3/4 in.)

DISTANCE 25 meters 100 meters 200 meters 300 meters 400 meters 500 meters 2-30

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11.4 cm (4 1/2 in.)

600 meters

(4) Battlesight Zeroing Adjustment. NOTE To remember your correct battlesight zero windage, note location of windage scale and windage knob pointer (heavy mark on outside of knob). NOTE Do not center rear sight aperture for inspections. Keep your correct battlesight zero windage on your weapon at all times. NOTE By following the steps below and establishing a zero at 25 meters, your sights will be set with a 300-meter battlesight. 2-31

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NOTE Do not move front sight post at this time. It was set at the factory or by a previous shooter and should be very close to your zero. NOTE Center the rear sight aperture by turning the windage knob left or right. (This is called mechanical zero windage.) (a) Position a 25 Meter Zero Target, NSN 6920-01-3952949, 25 meters from the firing line. The carbine target is on one side and the carbine target on the other. (b) The unmarked long range aperture should be up. (c) Rotate elevation knob in the down direction (counterclockwise). The elevation knob should stop on the 300-meter mark (6/3). 2-32

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The rear sight should be all the way down on the last whole “click” before it bottoms out. This is called mechanical zero elevation for the rear sight. If your range scale will not line up in the above manner, an armorer will be required to adjust the range scale for you. (d) The elevation knob should remain aligned on the 300 meter setting. Any further corrections required in elevation are made to the front sight post only. (e) Aim at target center. Adjust sight and rear windage to move shot group center as close as possible to the white dot in the center of target. (f) If your shot group is not in the center of the bull’s eye, use the squares on the target sheet to calculate the required “clicks” necessary to move your next shot group into the bull’s eye. (Remember that any changes in elevation are made by moving the front sight post.) The

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squares are numbered around the edges of the target to equal the number of clicks required to move the shot group to the bull’s eye. (g) In order to raise your next shot group, rotate the front sight post clockwise. (One click will move the strike of the bullet 1/2 in (1.2 cm.)) In order to lower your next shot group, rotate the front sight post counterclockwise (one click, as above, equals 1/2 in (1.2 cm)). Changes in windage are made with the windage knob. (One click will move the strike of the bullet 3/16 in (0.5 cm)). In order to move the shot group to the left, turn the windage knob counterclockwise. In order to move the shot group to the right, turn the windage knob clockwise. (h) Carefully aim and fire another group at the center of the target bull’s eye. (i) Repeat steps f through h, if required. (j) If your group is centered, your weapon is now zeroed. 2-34

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Figure 2-10. Check Receiver and Chamber. (5) Check receiver and chamber to ensure these areas contain no ammunition.

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Figure 2-11. Allow Bolt to Go Forward. (6) With selector lever pointing toward SAFE, allow bolt to go forward by pressing upper portion of bolt catch. e. Immediate Action.

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WARNING If a noticeable difference in sound or recoil is experienced, STOP FIRING. Either condition could indicate an incomplete powder burn and/or a bullet stuck in the bore. Retract bolt slowly and remove fired cartridge case. Clear weapon and check for unburned powder grains in the receiver or bore and for a bullet stuck in the bore. Remove unburned powder or bullet from bore before resuming firing. If the bullet is stuck in bore, return the weapon to the armor. (1) Slap upward on magazine to make sure it is properly seated.

Figure 2-12. Slap Upward on Magazine. 2-37

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WARNING Do not load with a hot chamber (2) Pull charging handle all the way back. Observe ejection of case or cartridge. Check chamber for obstruction. If chamber is not clear, apply remedial action.

Figure 2-13. Observe for Ejection of Cartridge or Case.

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(3) If cartridge or case is ejected or chamber is clear, release charging handle to feed new round. Don’t ride the charging handle forward.

(4) TAP forward assist. (5) Now FIRE. IF it won’t fire, look for trouble and apply remedial action.

Figure 2-14. Feed New Round. Tap Forward Assist.

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f.

Remedial Action. WARNING If your weapon stops firing with a live round in the chamber of a hot barrel, remove the round fast. However, if you cannot remove it within 10 seconds, remove magazine and wait 15 minutes with the weapon pointing in a safe direction. This way you won’t get hurt by possible round cooking off. Regardless, keep your face away from the ejection port while clearing a hot chamber.

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(1) If your weapon still fails to fire after performing. Immediate Action. Check again for jammed cartridge case.

(2) If a cartridge case is in the chamber, tap it out with a cleaning rod. Insert the cleaning rod into the muzzle and apply a slow downward push until cartridge case is dislodged.

Figure 2-15. Remedial Action. 2-41

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g. Bullet Stuck in Bore. WARNING If an audible ‘Pop’ or reduced RECOIL is experienced during firing, immediately CEASE FIRE. DO NOT APPLY IMMEDIATE ACTION.

(1) Remove the magazine.

(2) Lock the bolt to the rear.

Figure 2-16. Locking Bolt To Rear. 2-42

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(3) Place the selector lever on the “SAFE” position. (4) Visually inspect chamber or insert cleaning rod into the bore to ensure there is not a bullet stuck in the bore. (5) If a bullet is stuck in the weapon, DO NOT attempt to remove it. Turn the weapon into the armorer.

Figure 2-17. Check Bore for Stuck Bullet.

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h. Loading the Magazine. NOTE The magazine may be loaded quickly using ten-round stripper clips and the magazine filler found in each bandoleer. (1) With the magazine filler in place, place a ten-round stripper clip in position. Using thumb pressure on the rear of the top cartridge, press down firmly until all ten rounds are below the feed lips of the magazine.

Figure 2-18. Ten-Round Stripper Clip and Magazine Filler. 2-44

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(2) Remove the empty stripper clip while holding the magazine filler in place. (3) Repeat until three ten round clips are loaded. (4) Remove magazine filler and retain it for future use.

Figure 2-19. Loading Magazine.

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2-3.

INSTALL MAGAZINE.

a. Insert magazine into the magazine well until magazine catch engages and holds magazine. b. Tap upward to make sure it is seated right. Section III. Operation Under Unusual Conditions. 2-4.

ENVIRONMENT/WEATHER.

Unusual conditions are defined as any climatic condition requiring special maintenance of the weapon. Perform maintenance outlined for the climate that most applies to your operational area. a. Extreme Cold Climate - Arctic.

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CAUTION Be careful not to accidently fire your weapon when inserting gloved fingers into trigger area. (1) To operate the weapon in extreme cold, depress the trigger guard plunger and open the trigger guard to obtain easy access to the trigger when wearing arctic mittens. NOTE Under extreme conditions, a small amount of Cleaner, Lubricant, Preservative (CLP) on moving parts can prevent weapon from firing. Ensure CLP is thoroughly removed from weapon and Lubricating Oil, Arctic, Weapons (LAW) applied prior to extreme cold operations. (2) Cleaning and lubrication should be accomplished inside a warm room and the weapon should be at room temperature if possible.

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(a) Apply a light coat of LAW to all functional parts. (b) To prevent the condensation of moisture and freezing, keep the weapon covered when moving from a warn to a cold area to allow gradual cooling. (c) Always attempt to keep the weapon dry. (d) Unload and hand function the weapon every 30 minutes to help prevent freezing of functional parts. (e) Do not lay a warm weapon directly in snow or ice. (f) When moving a cold weapon into a warm place, condensation (moisture) will form in and on your weapon. If possible, leave your weapon in a protected but cold area outside. When the weapon is brought inside a warm place, it should be disassembled and wiped dry several times as it reaches room temperature. 2-48

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(g) Keep the insides of magazines and your ammo wiped dry. Moisture will freeze and cause malfunctions. Do not lube the ammo. (h) The use of the muzzle cap, protective magazine bag, and an overall weapon cover will help protect your weapon. Use them whenever the tactical situation permits. (i) For extended operations in extreme cold, have armorer remove trigger guard. b. Hot, Wet Climate - Jungle. NOTE Use CLP to clean and lubricate. (1) Perform normal maintenance as outlined in the PMCS table.

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(2) Clean and lubricate the weapon more frequently. Inspect hidden surfaces of the bolt and carrier assembly, upper receiver and chamber/barrel extension, and lower receiver and receiver extension for corrosion. Also pay close attention to the spring-loaded detents on the weapon. (3) To help prevent corrosion, remove handprints with a dry wiping rag. Then lubricate lightly with CLP. (4) Unload and check the inside of the magazine frequently for corrosion and moisture. Wipe ammunition dry before reloading. (5) Use magazine bag, muzzle cap, etc. for protection when the tactical situation permits. c.

Hot, Dry Climate - Desert.

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NOTE Hot, dry climates are usually areas containing blowing sand and fine dust. Deserts can be hot during daylight hours and freezing during hours of darkness. Consequently, this harsh environment will severely tax your weapon as well as all other types of equipment. Your weapon’s continued operation will depend on your detailed cleaning and lubricating procedures. (1) Dust and sand will get into the weapon and magazine. This will cause malfunctions. Give the inside areas and functional parts of the weapon a thorough cleaning every day and after firing missions. (2) Corrosion is less likely to form on metal parts in a dry climate: therefore, lubrication should be applied to the internal working surfaces and functional parts only. Use light amounts of lubrication. Unload and dry ammunition and inside of magazines daily. Do not lubricate.

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(3) The use of overall weapon protection cover, muzzle cap, and spare magazine protective bags will help protect the weapon and ammo from sand and dust. Use these items when the tactical situation permits. (4) Keep the bolt and ejection port cover closed, a magazine installed in the weapon, and muzzle cap on the muzzle to help keep out sand and dust. d. Heavy Rain and Fording Operations - All Climates. (1) Perform maintenance in accordance with the appropriate climate conditions. (2) Always attempt to keep weapon dry. (3) Use weapon cover, muzzle cap, and protective bags to protect weapon, ammo, and magazines.

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(4) Always drain any water from barrel prior to firing. Dry the bore with a swab and cleaning rod if it is wet. (5) After Fording: WARNING Do not fire if water is present in the barrel. (a) Remove muzzle cap (if applicable). (b) Point the muzzle down and shake vigorously. (c) Pull charging handle two to three inches to allow water to drain. (d) Release charging handle and strike forward assist to seat round and lock bolt.

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(e) Clear the drain hole in the stock with a pipe cleaner and drain. (6) After Salt Water Operations. (a) Clean the rear sight as soon as possible if it has salt water on it. (b) Wash the rear sight with fresh water if you don’t have time to clean it with CLP.

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CHAPTER 3 MAINTENANCE INSTRUCTIONS Section I. Inspection and Lubrication. 3-1.

INSPECTION GUIDE.

During and after cleaning the operator should inspect the carbine and its components for any irregularities that may cause problems during its operation. If any potential deficiencies are noted, they should be corrected immediately. • • • •

Damaged or missing parts Improper assembly or function Absence of free movement, where applicable Uncustomary looseness

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• • • • • • 3-2.

Parts exhibiting signs of cracks, burrs, dents or obvious signs of damage or stress Presence of signs or tactile clicks in controls, where applicable General overall cleanliness Presence of proper lubrication Movement of gas piston (free movement) Presence of corrosion or degradation of surface finish LUBRICATION GUIDE.

a. CLP - Cleaner Lubricant Preservative. Use CLP as follows: (1) Always shake bottle well before use. (2) Place a few drops on a patch or rag.

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(3) Clean your weapon with these patches and rags until they come out clean. (4) Take a patch or rag and apply a fresh, light coat. NOTE DO NOT ‘dry clean’ your weapon. DO NOT use hot water or other solvents or you will wash away the Teflon lubricant that has been building up as a result of your using CLP. If CLP is not used, Rifle Bore Cleaner (RBC) may be used to remove carbon within the bore. Dry cleaning solvent may be used to completely remove lubricants. For example, when moving to extreme cold weather operations, to remove traces of CLP before applying LAW.

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NOTE Wherever the term CLP or the words lube or lubricant are cited in this Technical Manual (TM), it is to be interpreted to mean that CLP, Lubricant, Small Arms (LSA), or LAW can be utilized as applicable, The following constraints must be adhered to (1) Under all but the coldest arctic conditions, LSA or CLP are the lubricants to use on your weapon. Either may be used at -10oF or above. However, do not use both on the same weapon at the same time. (2) LAW is the lubricant to use during cold arctic conditions, +10oF and below. (3) Any of the lubricants may be used from -10oF to +10oF. (4) Do not mix lubricants on the same weapon. The weapon must be thoroughly cleaned during change from one lubricant to another. Dry cleaning solvent (SD) is recommended for cleaning during change from one lubricant to another.

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b. Lube Guide. Under all but the coldest Arctic conditions, CLP or LSA are the lubricants to use on your weapon. Remember to remove excessive lubricant from the bore and chamber before firing. CLP - cleaner, lubricant, and preservative LSA - Weapons lubricant oil, semifluid BETWEEN 10 F (-12 C) and -10 F (-23 C) use CLP, LSA or LAW. Below -10 F (-23 C) use only LAW. LAW - Weapons lubricating oil, arctic Lightly Lubed - A film of lubricant barely visible to the eye. Generously Lubed - Heavy enough so that it can be spread with the finger.

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c.

Lubricating Upper Receiver.

Lightly lube inside of upper receiver, bore and chamber, outer surfaces of barrel and front sight, and surfaces under handguard. Depress front sight detent and apply one drop lube to front sight detent. Depress several times to work lube into the spring.

Figure 3-1. Lubricate Upper Receiver. 3-6

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d. Lubricate Bolt Carrier Assembly. (1) Place one drop CLP in carrier key. (2) Generously lubricate outside of these parts. Make certain to get cam pin area, bolt rings, and outside of the bolt body. Put a light coat on extractor and pin.

Figure 3-2. Lubricate Bolt-Carrier Key. 3-7

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(3) Lightly lubricate charging handle and inner and outer surfaces of the bolt carrier. Generously lubricate slide and cam pin area of bolt carrier.

Figure 3-3. Lubricate Charging Handle and Bolt Carrier.

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e. Lubricating Lower Receiver Assembly.

Figure 3-4. Lubricating Lower Receiver Assembly. (1) Lightly lubricate inside buffer tube. (2) Generously lubricate takedown and pivot pins and detents. Also lightly lubricate moving parts inside lower receiver and their pins.

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f.

Lubricate Adjustable Rear Sight. NOTE Make a note of how far you move the sight so it can be returned to the original position at completion of this task.

(1) Use one drop of lube and rotate these parts to ensure lubricant is spread evenly above and below: (a) Elevation knob (b) Elevation screw shaft (c) Windage knob (d) Windage screw (e) Detent holes 3-10

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(f) Aperture (flip up and down)

Figure 3-5. Lubricating Rear Sight.

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(2) Elevation Shaft. Also lubricate from inside the upper receiver as follows: (a) Put two or three drops around the bottom edge of the elevation screw shaft and in elevation detent spring hole. (b) Rotate the elevation dial as far as possible a few times while keeping upper receiver upside down. g. After Lubing Rear Sight. (1) Reset your correct zero windage and your battlesight zero. (2) Notice that the rear sight is down when the “3” is aligned with the mark on the left side of the left side of the receiver. (3) You will feel a ‘click’ when the “3” first lines up with the mark.

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(4) Carry your weapon with the “3” aligned with the mark. (5) Keep the sight on 300 meters to keep dirt and water out of sight mechanism and protect the sight from damage. Section II. Troubleshooting Procedures. 3-3.

TROUBLESHOOTING.

a. Table 3-1 lists the common malfunctions that may occur during the operation or maintenance of the carbine or its components. Perform the tests/inspections and corrective actions in the order listed. b. This manual cannot list all malfunctions that may occur, nor all tests and inspections and corrective actions. If a malfunction is not cor-

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rected by listed corrective actions, forward to the unit armorer for the corrective action. Table 3-1: Troubleshooting Procedures. MALFUNCTION Failure to Fire.

TEST OR INSPECTION CORRECTIVE ACTION Tap, rack, attempt to fire. Notify unit Armorer. light indentation on the primer. Selector lever on SAFE. Put in fire position. Improper assembly of fir- Assemble correctly ing pin. retaining pin goes in back of large shoulder of firing pin. Too much oil in firing pin Wipe out with pipe recess. cleaner. 3-14

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Table 3-1: Troubleshooting Procedures. (Cont’d) MALFUNCTION

TEST OR INSPECTION CORRECTIVE ACTION Defective ammo.

Remove and discard.

Too much carbon on firing pin or in firing pin recess.

Clean.

Bolt Won’t Unlock

Dirty or burred bolt.

Notify unit Armorer.

Won’t Feed

Dirty or corroded ammo. Clean. Dirty magazine.

Clean.

Defective magazine.

Replace.

Too many rounds in magazine.

Take out excess.

Action of buffer assembly Take out buffer and is restricted. spring and clean.

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TEST OR INSPECTION CORRECTIVE ACTION Magazine not fully seated.

Tap on magazine or adjust magazine catch.

Double Feed.

Defective magazine.

Replace.

Won’t Chamber

Dirty or corroded ammu- Clean or replace. nition. Damaged ammunition.

Replace

Carbon in chamber or on Clean. gas tube. Won’t Lock.

Won’t Extract.

Dirt, corrosion, or carbon Clean lugs. buildup in barrel or bolt locking lugs. Frozen extractor.

Remove and clean.

Broken extractor spring.

Return to Armorer.

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TEST OR INSPECTION CORRECTIVE ACTION Restricted buffer assem- Remove and clean. bly.

Won’t Extract.

Restricted movement of bolt carrier group.

Remove, clean, and lube. (Before putting bolt back in, make sure gas tube fits into carrier key and that the carrier moves freely.)

Dirty or corroded ammo. Remove and clean. Push out stuck cartridge with cleaning rod. Short Recoil.

Dirty chamber.

Clean chamber.

Gaps in bolt rings (not staggered).

Stagger ring gaps.

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TEST OR INSPECTION CORRECTIVE ACTION Missing or broken rings. Three rings required.

Notify Armorer.

Carbon or dirt in carrier key or on outside of gas tube.

Clean.

Pipe cleaner stuck inside Notify Armorer. carrier key. Bolt Fails to Lock After Last Round. Selector Lever Binds.

Dirty or corroded bolt latch.

Clean.

Faulty magazine.

Replace.

Needs oil.

Lubricate.

Dirt or sand under trigger.

Clean.

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TEST OR INSPECTION CORRECTIVE ACTION WARNING Keep clear of muzzle

Bolt Carrier ‘Hung Up’

Round jammed between Remove magazine. bolt and charging handle Remove rounds, if not and/or double feed. removed notify Armorer. CAUTION If round is removed, bolt is under spring pressure.

3-4.

DISASSEMBLY PROCEDURES (FIELD STRIPPING). WARNING To be considered SAFE before Disassembly, cleaning, inspecting, transporting, or storing, the weapon must be clear. 3-19

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a. Clear weapon. b. Remove the sling assembly. CAUTION Do not use a screw driver or any other tool when removing the handguards. Doing so may damage the handguard and/or ship ring. c. Push takedown pin as far as it will go. Pivot upper receiver from lower receiver. d. Push receiver pivot pin as far as it will go. e. Separate upper and lower receivers. f.

Pull back charging handle and bolt carrier.

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g. Remove bolt carrier and bolt. h. Remove charging handle. i. Remove firing pin retaining pin. Do not spread pin open or close split end of pin.

Figure 3-6. Remove Firing Pin Retaining Pin. 3-21

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j.

Push in bolt assembly to locked position.

Figure 3-7. Locking Bolt into Carrier.

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k.

Drop firing pin out rear of bolt carrier.

Figure 3-8. Remove Firing Pin.

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l. Turn cam pin 1/4 turn and lift it out of the Bolt Carrier. Then remove the bolt.

Figure 3-9. Removing Bolt from Bolt Carrier.

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CAUTION Disassemble using steps m through q only when dirty or damaged. NOTE Press rear of extractor to check spring function. Report to Armorer if spring is weak. m. Push out the extractor pin and remove cartridge extractor and extractor spring as a unit.

Figure 3-10. Remove Extractor Pin & Extractor & Spring Assy. 3-25

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n. Press in on buffer, depress retainer and release buffer.

Figure 3-11. Releasing Buffer.

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o. Remove buffer and action spring.

Figure 3-12. Buffer and Action Spring Removed.

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p. Fully extend buttstock assembly. q. Grasp the lock release lever in the area of the retaining nut, pull downward, and slide buttstock to the rear to separate the buttstock assembly from the lower receiver extension.

Figure 3-13. Remove Buttstock Assembly. r.

Disassemble Magazine. 3-28

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NOTE Do not remove magazine follower from spring.

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(1) Release base catch.

(2) Remove base.

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(3) Jiggle spring and follower to remove. Figure 3-14. Disassemble Magazine.

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3-5.

CLEANING, INSPECTION, AND REPAIRS. WARNING Before cleaning be sure to clear the weapon. a. General.

(1) With the weapon disassembled, thoroughly clean, inspect and lubricate. (2) Always shake CLP before use. (3) After firing, clean your weapon according to instructions. Wipe dry and lubricate according to lubrication instructions. (4) Cleaning materials.

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b. Bore. NOTE The bore of your weapon has lands and grooves called rifling. Rifling makes the bullet spin very fast as it moves down the bore and down range. Because it twists so quickly, it is difficult to push a new, stiff bore brush through the bore. You will find it easier to pull your bore brush through the bore. Also, because the brush will clean better if the bristles follow the grooves (called tracking), you want the bore brush to be allowed to turn as you pull it through. (1) Attach three rod sections together. (2) Swab out the bore with a patch moistened with CLP or carbine bore cleaner (RBC).

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(3) Attach bore brush, don’t reverse direction while in bore. (4) Point muzzle down. Hold receiver in one hand while inserting the end of the rod without the brush into the chamber. Let the rod fall straight through the bore. About 2-3 inches will be sticking out of the muzzle at this point. (5) Attach the handle section of the cleaning rod to the end of the rod sticking out of the muzzle. (6) Push the brush through the bore and out the muzzle. (7) After one pull, take off the handle section and repeat the process. (8) Send a patch through the bore after three or four pulls of the brush to help clean out the debris that the brush is getting loose. Replace

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the bore brush with the rod tip (patch holder) and a wet patch. Drop it through. You won’t need to attach the handle to pull only a patch through. c.

Upper Receiver. Clean with CLP: (1) All areas of powder fouling, corrosion, dirt, and rust. (2) Bore and chamber. (3) Locking lugs. (4) Gas Tube.

(5) Install chamber brush on cleaning rod. Dip in CLP and insert in chamber and locking lugs. Clean by pushing and twisting cleaning rod.

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Figure 3-15. Cleaning the Chamber. NOTE Gas tubes will discolor from the heat. Do not attempt to remove discoloration. NOTE Use a worn bore brush to perform the following step. This procedure ruins the bore brush.

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Use a bore brush to clean outside surface of protruding gas tube (get sides and bottom from bottom of upper receiver). Figure 3-16. Cleaning Gas Tube. d. Bolt Carrier Assembly. Clean with CLP. (1) Clean carbon and oil from firing pin, firing pin recess and all surfaces of bolt/bolt carrier with dry swabs. 3-37

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(2) Clean bolt carrier key with worn brush. (3) Clean firing pin hole with pipe cleaner. NOTE Use well-worn bore brush only. (4) Clean carbon deposits and dirt from locking lugs. (5) Clean areas behind bolt ring and under lip of extractor. e. Lower Receiver and Buttstock Assembly. CAUTION Do not use wire brush or any type of abrasive material to clean aluminum surfaces. (1) Wipe dirt from trigger with a swab. 3-38

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(2) Use a swab dipped in CLP and cleaning brush to clean powder fouling, corrosion, and dirt from outside parts of lower receiver and extension assembly. (3) Clean buffer assembly, spring, and inside lower receiver and buffer tube with swab dipped in CLP. Wipe dry. f.

Ejector. (1) Place a few drops of CLP around the ejector to form a pud-

dle. (2) Take a fired or dummy case and place it under the top of the extractor. With a rocking motion, press the case down against the ejector. Since the ejector is spring loaded, some resistance will be felt. Press on the case until it stops against the bolt face. Ease off with your thumb slightly and press down again. Repeat several times.

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(3) Replace CLP frequently. Once the spring action of the ejector is smooth and strong, dry off any excess. g. Clean the magazine. (1) Remove dirt, grit, or other foreign matter with a clean wiping cloth. (2) In general a light coating of CLP on all internal magazine component surfaces is best. (a) In dusty desert conditions, totally wipe parts dry. Adding some powdered graphite may also improve operation of the magazine. (b) Heavier lube is better in damp environments to enhance corrosion resistance.

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Section III. Inspection Instructions. NOTE Inspect before lubricating. a. Upper Receiver and Barrel Assembly. WARNING Do not interchange bolts between weapons. (1) Inspect rail system (1) for cracks. (2) Inspect front sight post (2) for straightness and check depression of the front detent. (3) Inspect compensator (3) for looseness. (4) Inspect barrel (4) for straightness, cracks or burrs. 3-41

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(5) Inspect charging handle (5) for cracks bends or breaks. (6) Inspect rear sight assembly (6) for the capability to adjust windage and elevation and the spring should retain the short range or long range sight in position. (7) Inspect gas tube (7) for bends or retention to barrel (installed not shown).

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Figure 3-17. Inspect the Upper Receiver and Barrel Assembly. b. Bolt and Bolt Carrier Assembly. (1) Inspect bolt cam pin (1) for cracking or chipping. (2) Inspect firing pin (2) for bends, cracks or sharp or blunted tip. (3) Inspect for missing or broken gas rings (3).

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(4) Inspect bolt cam pin area (4) for cracking or chipping. (5) Inspect locking lugs (5) for cracking or chipping. Inspect bolt face (6) for excessive pitting. (6) Inspect extractor assembly (7) for missing extractor spring assembly with rubber o-ring and for chipped or broken edges on the lip which engages the cartridge rim. (7) Inspect firing pin retaining pin (8) to determine if bent or badly worn. (8) Inspect bolt carrier for loose bolt carrier key (9). (9) Inspect for cracking or chipping in cam pin hole area (10).

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Figure 3-18. Inspect Bolt and Bolt Carrier Assembly.

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c.

Lower Receiver and Buttstock Assembly. (1) Inspect buffer (1) for cracks or damage. (2) Inspect buffer spring (2) for kinks (installed inside). (3) Inspect buttstock (3) for broken buttplate or cracks. (4) Inspect for bent or broken selector lever (4). (5) Inspect carbine grips (5) for cracks or damage. (6) Inspect for broken or bent trigger (6).

(7) Visually inspect the inside parts of the lower receiver (7) for broken or missing parts.

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Figure 3-19. Inspect Receiver and Buttstock Assembly. 3-47

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3-6.

REASSEMBLY PROCEDURES (FROM FIELD STRIP). a. Assemble the magazine.

(1) Insert follower and jiggle spring to install. 3-48

SW370-A3-OPI-010

Figure 3-20. Assemble the Magazine (2) Slide the base under all four tabs until base catches. b. Grasp the lock release lever in the area of the retaining nut and pull to install the buttstock assembly onto the lower receiver extension. 3-49

SW370-A3-OPI-010

c.

Insert buffer spring and buffer. Figure 3-21. Inspect Buffer and Buffer Spring. NOTE Be sure not to lose extractor spring and rubber insert.

3-50

SW370-A3-OPI-010

d. Insert the large end of the extractor spring assembly in the extractor and seat it by pushing and turning clockwise. e. Insert extractor assembly into bolt.

Figure 3-22. Assembly Extractor to Bolt. f.

Install extractor pin.

3-51

SW370-A3-OPI-010

g. Slide bolt into bolt carrier. WARNING Be sure the cam pin is installed in the carrier assembly. If cam pin is not installed, your weapon can still fire and will explode. h. Insert bolt cam pin into bolt carrier and turn 1/2 turn.

Figure 3-23. Inserting Bolt Cam Pin. 3-52

SW370-A3-OPI-010

i.

Drop in and seat firing pin.

j.

Pull bolt out.

Figure 3-24. Install Firing Pin. k.

Insert firing pin retaining pin from the left side of the bolt carrier.

3-53

SW370-A3-OPI-010

Figure 3-25. Install Firing Pin Retaining Pin.

3-54

SW370-A3-OPI-010

NOTE Firing pin should not fall out when bolt carrier assembly is turned upside down. l.

Insert charging handle part way into upper receiver assembly.

Figure 3-26. Install Charging Handle.

3-55

SW370-A3-OPI-010

m. With the bolt extended from the bolt carrier assembly, slide the bolt into the upper receiver.

Figure 3-27. Install Bolt Carrier Assembly. n. Push charging handle and bolt carrier assembly together into upper receiver until fully seated.

3-56

SW370-A3-OPI-010

Figure 3-28. Joining Upper and Lower Receivers. o. Join upper and lower receivers.

3-57

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Figure 3-29. Engage Receiver Pivot Pin. p. Engage receiver pivot pin.

3-58

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CAUTION Selector lever must be on SAFE or SEMI before closing upper receiver.

Figure 3-30. Close Upper and Lower Receiver. q. Close upper and lower receiver assembly. Push in takedown pin. r.

Install sling. 3-59

SW370-A3-OPI-010

3-7.

FUNCTION CHECK. WARNING Before starting functional check, be sure to clear the weapon. DO NOT squeeze the trigger until the weapon has been cleared. Inspect the chamber to ensure that it is empty and no ammunition is in position to be chambered. a. Remove Magazine and Check Chamber.

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SW370-A3-OPI-010

b. Perform Functional Check. c. Place selector lever on SAFE: Pull charging handle to rear and release. Pull trigger. Hammer should not fall.

3-61

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NOTE Slow is defined as 1/4 to 1/2 the normal rate of bigger release. d. SEMI: Place selector lever on SEMIAUTOMATIC. Pull trigger. Hammer should fall. Hold trigger to the rear and charge the weapon. Release the trigger with a slow, smooth motion, until the trigger is fully forward. An audible click should be heard. Hammer should not fall. Repeat SEMI position test five times. Carbine must not malfunction (hammer falls on release of trigger) during any of the five tests.

3-62

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e. AUTOMATIC: Pull the charging handle to the rear, charging the weapon. Squeeze the trigger; hammer should fall. Hold the trigger to the rear and cock the weapon again. Fully release the trigger then squeeze it again. The hammer should not fall because it should have fallen when the bolt was allowed to move forward during the chambering and locking sequences.

3-63/(3-64 Blank)

SW370-A3-OPI-010

CHAPTER 4 MAINTENANCE OF AUXILIARY EQUIPMENT (ACCESSORIES) Section I. Inspection and Lubrication. 4-1.

VERTICAL HANDGRIP. a. Installation Procedures. NOTE The rail covers will lock only into the end slots of the rails.

(1) Detach the rail cover section from the rail on which the (Per ST 23-31-1) grip will be installed.

4-1

SW370-A3-OPI-010

(2) For the carbine, if the vertical handgrip will be installed at the muzzle end of the rail, first install a half length “6 rib” rail cover section so it latches into the end slot. Figure 4-1. Install Vertical Hand Grip.

4-2

SW370-A3-OPI-010

Figure 4-2. Vertical Handgrip. 4-3

SW370-A3-OPI-010

(3) Unscrew the vertical handgrip lock to the point that the upper tip rests below the slotted surface of the base in the unlocked position. (4) Slide the vertical handgrip on the desired rail from the muzzle end. (5) If placed on the lower rail, the vertical handgrip is aligned so it covers the first five slots and the vertical handgrip lock is aligned into the third slot from the end. .

4-4

SW370-A3-OPI-010

NOTE Assure the top of the vertical handgrip lock is aligned with a rail slot or the top may be damaged. In addition, the vertical handgrip may come loose if the top is not aligned properly into a slot. (6) With the tip of the vertical handgrip lock centered into the desired recoil slot, while observing through the holes in the side of the vertical handgrip, screw the lock all the way into the grip to the base of the grip lock to aid in later disassembly.

4-5

SW370-A3-OPI-010

(7) If the vertical handgrip is installed at other locations, experiment with rail cover sections of different lengths to protect the rail surface and the shooter’s hand from contact with the metal parts of the rail. b. Cleaning and Inspection of the Vertical Handgrip. (1) Clean, inspect and lubricate when the vertical handgrip is installed or repositioned on the tail. At a minimum, clean and inspect weekly. More frequent cleaning may be necessary by operational conditions. (2) For cleaning and inspection, remove the vertical handgrip from the rail. Then unscrew and remove the lock from the base of the vertical handgrip. Clean the lock and base (including the internal threads) as well as the rail surface and recoil slots exposed by the removal of the vertical handgrip and rail cover.

4-6

SW370-A3-OPI-010

NOTE Care should be taken while stoning on the rails to not alter the dimensions of the slots or rail edges. (3) Burrs which interfere with attachment or detachment may be removed by an armorer using a stone. (4) Lightly lubricate the rail surfaces but not the grip itself. The shaft and threads of the vertical handgrip lock are self-lubricating polymer and should not require lubrication. 4-2.

RAIL INTERFACE SYSTEM.

a. The RIS may be removed for cleaning in the same manner as standard handguards, but first, using a suitable flat tip screwdriver, loosen the screw/latch at the muzzle end of the upper RIS assembly, but only to the point that the latch touches the bottom of the rail. Compress the rear

4-7

SW370-A3-OPI-010

handguard slip ring and pivot the upper and lower RIS assemblies off the front handguard retaining cap.

Figure 4-3. Remove RIS Assembly.

4-8

SW370-A3-OPI-010

CAUTION If the upper RIS is removed without first loosening the screw at the muzzle end, components may be damaged.

b. Attachment and Detachment of the Rail Interface System. (1) Handguard sections can be quickly attached and detached from the RIS. A spring latch at one end of each handguard section automatically engages cutouts in rail recoil grooves #1 or #15 (depending on its orientation). To slide a handguard section beyond a cutout, or to remove it, slide it in the desired direction while applying thumb pressure to the center of its spring latch.

4-9

SW370-A3-OPI-010

Figure 4-4. RIS Handguard Sections. (2) To cover the side and bottom quadrants, install the handguard sections from the muzzle end of the RIS. To cover the top quadrant, install the handguard sections from the rear of the upper receiver group with the carrying handle or sighting system removed. (3) As the spring latch meets its locking cutouts at either end of the rail, it will engage. Full length handguard sections should be installed with the spring latches towards the muzzle. Shorter handguard sections 4-10

SW370-A3-OPI-010

(used on rails partially occupied by accessories) should be oriented with their spring latches away from the accessories. (4) Nine handguard sections of various lengths are provided with the RIS. They are: Four full length (6.15”) sections Two 3.9” (approximately help length) section One 2.65” (medium short length) section Two 1.65” (approximately one-third length) sections For ease of reference, the three shorter lengths can be referred to by the number of ribs along their outer surfaces: “6 rib,” “4 rib,” or “2 rib.” See figure 4-17.

4-11

SW370-A3-OPI-010

Figure 4-5. Install Handguard Sections from Muzzle End.

4-12

SW370-A3-OPI-010

4-3.

ENHANCED COMBAT OPTICAL SIGHT-NAVY.

Enhanced Combat Optical Sight-Navy (ECOS-N) is a variable intensity, non-magnifying, day optical sight designed for close combat. It allows very fast target acquisition and engagement at short ranges, while still providing enhanced aiming out to 300 meters as compared to iron sights. The aiming dot is powered by a lithium battery with a manufacturer estimated life of 100-1000 hours. The sight uses a projected red dot collimator, that when zeroed, creates an optical axis that is aligned with the bore and uses reflective coatings on the lens to generate an aiming dot image that appears to be out at the target rather than on the lens. Since this sight is a collimator the dot remains well aligned with the bore no matter from what angle it is viewed or in what part of the lens it appears. The ECOS-N is designed to maximize the unobstructed view around the sight. This combined with a “both eye open” shooting technique 4-13

SW370-A3-OPI-010

enhances the situational awareness and the speed and ease of acquiring and tracking targets.

Figure 4-6. ECOS-N.

4-14

SW370-A3-OPI-010

ITEM 1 2 3 4 5

DESCRIPTION Battery Cap, Short Cap, Adjustment (Windage/Elevation) Cap, Rotary Switch Lens Cover, Rear Lens Cover, Front

a. ECOS-N Installation. (1) Battery Installation: Remove battery cap and install battery with positive (+) end towards cap. Inspect the O-ring to be sure it is present and not damaged. Failure to do so could result in water leakage into the battery compartment. Reinstall battery cap - hand-tighten only. Use of tools could damage equipment. Verify the red dot is present.

4-15

SW370-A3-OPI-010

(2) Installing the ECOS-N on the Mount: Remove the battery cap from the sight. Remove the four allen screws and cover from the mount, then replace with the sight in position and firmly tighten the screws. The windage and elevation adjustments should be to the top and right respectively. Reinstall the battery cap.

Figure 4-7. ECOS-N Mount 4-16

SW370-A3-OPI-010

(3) Installing the ECOS-N on the Weapon: Ensure the rail and grabber are free of dirt, paint, and burrs to assure a repeatable zero. Position the sight and mount on the rail, then hand tighten plus 1/4 turn the rail grabber knob, figure 4-20. The knob should be to the left of the carbine. Ensure there is space between the bottom front part of the sight and the top of the base/weapon. It is recommended that the sight be placed at the furthest forward position on both the receiver and the rail interface system. Placing the sight too far back will obscure the shooter’s peripheral vision. For the best zero retention, always place the mount into the same slot on the rail.

4-17

SW370-A3-OPI-010

Figure 4-8. Mounting the ECOS-N to the Rail.

4-18

SW370-A3-OPI-010

b. ECOS-N Operation. Zeroing. CAUTION Do not continue to adjust windage and elevation mechanisms if resistance is encountered. This could result in damage to equipment. (1) Sight Zero: The ECOS-N is mechanically zeroed at the factory. If the sight is properly installed, only small adjustment should be necessary. The, per click, windage and elevation adjustments are set at 1/2 inch at 100 yards, or 13 millimeters at 100 meters. After initial firing, check to ensure the mount and sight are still secure. After completion of zero turn selector switch to OFF and close lens covers. (2) Dry zeroing or bore-sight: If necessary, the ECOS-N can be dry zeroed to previously zeroed iron sights. The weapon does not need to be fired to adjust the dot to be close to the iron sight point-of-impact. With previously zeroed iron sights, adjust the center of the dot to the tip of 4-19

SW370-A3-OPI-010

the front sight post. Then add eight clicks of adjustment in the up direction to compensate for the additional height of the ECOS-N above the front sight post. This method will give satisfactory performance to 100 meters. Beyond 100 meters the sight should be zeroed by live fire. (3) Point of Aim: The aiming dot in the reflex sight appears to be approximately 4 to 5 minutes of angle. This means that as the range increases, the aiming dot appears to cover a larger portion of the target. See Figure 4-8 for relationship of Range, Aiming DOT, and M855 Projectile Trajectory.

4-20

SW370-A3-OPI-010

Figure 4-9. ECOS-N Dot Appearance/Point of Impact at Various Ranges for M855 Ball. 4-21

SW370-A3-OPI-010

(4) Night Operation: The ECOS-N has 10 red dot intensity settings. Four of these are suitable for use with night vision devices. The higher settings are visible through the front of the sight and could give away your position. NOTE At higher intensity settings the red dot is visible through the front of the sight. (5) Operation Under Extreme Conditions: (a) Extreme Heat: No special procedures required. (b) Extreme Cold: Could shorten battery life. Keep extra batteries warm.

4-22

SW370-A3-OPI-010

(c) Sea Spray, Water, Mud and Snow: Ensure battery cap and two adjustment screw caps are hand tightened before exposure or submersion. Clean lenses as soon as possible after exposure. (d) Dust and Sand Storms: Keep lens caps closed. (e) High Altitudes: No special procedures required. c.

ECOS-N Maintenance.

(1) Care & Cleaning: Clean the lens of dust or salt by rinsing it in fresh water. Shake or blow out excess water and dry the lens with a clean and soft cloth. To avoid scratching the lens, rinse all particles from the lens fully before wiping it with the cloth. The lens should never be cleaned with your fingers. (2) Operator Repair: Maintenance is limited to inspection and replacements of repair parts. Items requiring further repairs are to be 4-23

SW370-A3-OPI-010

returned to the Program Office and replaced per instructions in Annex A of ST-23-31-1. (3) Repair Parts List: A list of repair parts is contained in Annex A of ST-23-31-1. All listed parts can be installed at the operator or unit level. Special tools or equipment are not required. (4) Storage: The ECOS-N is listed in Registry as a serialized item. It should be stored in accordance with applicable service physical security instructions. Remove battery and allow lenses to dry before storage. Keep lens caps closed when the sight is not in use. 4-4.

VISIBLE BRIGHT LIGHT II.

Visible Bright Light (VBL) II is used inside buildings, tunnels, etc. to facilitate movement, search, and identification of the target. The VBL II is most useful in military operations other than war when search and clear operations are complicated by tripwires, mines, and non-combatants and 4-24

SW370-A3-OPI-010

danger of revealing your position is offset by the need for better vision than is possible with night vision goggles. The bright white light can confuse an opponent in CRE and provide momentary advantage. The VBLII operates on three SF123 Lithium Batteries.

4-25

SW370-A3-OPI-010

Figure 4-10. Visible Bright Light (VBL) II Major Components. 4-26

SW370-A3-OPI-010

a. VBLII Installation. (1) Install the three 123A Lithium batteries into the body Assembly with the + (positive) terminal facing forward (towards the Bezel). (2) Select the location desired on the weapon for mounting the Pressure Switch. Remove the paper backing from the Velcro “loop” provided in the kit and place Velcro on weapon. Remove the paper backing from the Velcro “hook” and press it in place on the flat side of the Pressure Switch. Position the Pressure Switch on the weapon. Route the cable so that it does not interfere with weapon operation. (3) Hold the Body Assembly against the MIL-STD-1913 Rail on the weapon and tighten the two thumb nuts on the Mount. (4) Tighten the Rear Cap finger tight. The VBLII is ready for use.

4-27

SW370-A3-OPI-010

b. VBLII Operation. Apply pressure to the Push Button Switch. The light will come ON. It will stay ON as long as pressure is applied. Turn the Rear Cap clockwise until snug and the light will come ON. The light can be deactivated by unscrewing the Rear Cap Assembly one full turn. This will prevent unintentional turn on. c.

VBLII Maintenance. (1) Care and Cleaning.

(a) Clean the VBLII by flushing the outer surfaces with water and wiping with a soft cloth. Such cleaning should be done whenever the VBLII becomes dirty or is exposed to salt water.

4-28

SW370-A3-OPI-010

(b) To clean the VBLII lens or filters, wipe using a lens tissue or soft cloth with clean water, alcohol, or general purpose window cleaner. CAUTION Avoid storing and transporting the VBLII with batteries installed. This reduces the chance of accidental activation and equipment damage due to heat build-up and battery leakage. (2) Operator and Organizational Maintenance. (a) Maintenance is limited to inspection and replacements of repair parts. Units requiring further repairs are to be returned to the Program Office and replaced.

4-29

SW370-A3-OPI-010

(b) A list of repair parts is contained in Annex A. All repair parts can be installed at the operator or unit level. Special tools or equipment are not required for maintaining the VBLII. (c) Do not store with batteries installed. (d) Bulb Replacement. 1 If a bulb fails to function, unscrew the reflector bezel and remove the lens/bezel assembly. Remove the old reflector and bulb assembly, and replace with a new assembly. 2 All repair parts can be installed at the operator or unit level without special tools or equipment. 3 A complete listing of repair parts and procedures is found in Annex A of ST-23-31-1.

4-30

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CHAPTER 5 AMMUNITION 5-1.

AMMUNITION.

Use only authorized ammunition that is manufactured to US or NATO Specifications.

5-1

SW370-A3-OPI-010

WARNING DO NOT FIRE: • Seriously corroded ammunition • Dented cartridges • Cartridges with loose bullets • Cartridges exposed to extreme heat (135oF) until they have cooled • Cartridges with bullet pushed in (short rounds)

Turn defective ammunition to range noncommissioned office (NCO). Keep ammunition dry and clean.

5-2

SW370-A3-OPI-010

APPENDIX A BASIC ISSUE ITEMS (BII) LIST A-1. SCOPE. This appendix lists the basic issue items (BII) for the MK 18 MOD 0 5.56 MM. Carbine. A-2. BASIC ISSUE ITEMS (BII) LIST. The BII list is described as follows: These are minimum essential items required to place the MK 18 MOD O into operation and to perform emergency repairs. Although shipped separately packages, BII must be with the MK 18 MOD 0 during operation and whenever it is transferred between property accounts.

A-1

SW370-A3-OPI-010

This manual is your authority to request/requisition replacement BII, based on authorization of the end item. A-3. EXPLANATION OF COLUMNS. The following provides an explanation of columns found in the tabular listing: Column (1) - Item Number (Illus No.). This column indicates the number on the illustration on page A-3. Column (2) - National Stock Number. Indicates the national stock number (NSN) assigned to the item and will be used for requisitioning purposes. Column (3) - Description, CAGEC, and Part Number. Indicates the Federal item name and, if required a minimum description to identify and

A-2

SW370-A3-OPI-010

locate the item. The last line for each item indicates the Commercial and Government Entity Code (CAGE) followed by the part number. Column (4) - UOC. Column (5) - Unit of Measure (U/M). Indicates how the item is issued for the NSN shown in column two. Column (6) - Quantity Required (Qty Req). Indicates the quantity of the item authorized to be used with/on the equipment. Section II. Basic Issue Items. (1) Illus NO.

(2) National Stock Number

(3) Description, CAGEC, and Part Number

1005-00-921-5004

Magazine, Cartridge: 30 Round (19204) 8448670

A-3/(A-4 BLANK)

(4)

(5)

UOC

U/M

(6) Qty Req

EA

1

SW370-A3-OPI-010

APPENDIX B ADDITIONAL AUTHORIZED LIST Section I. Introduction. B-1. SCOPE. This appendix lists the additional items you are authorized for the support of the MK 18 MOD 0 5.56MM Carbine. B-2. GENERAL. This list identifies items that do not have to accompany the MK 18 MOD 0 and that do not have to be turned in with it. These items are all authorized to you by Table of Authority (TOA).

B-1

SW370-A3-OPI-010

B-3. EXPLANATION OF LISTING. National stock numbers, descriptions, and quantities are provided to help you identify and request the additional items you require to support this equipment. The items are listed in alphabetical sequence by item name under the type document (i.e., TOA which authorizes the item(s) to you). B-4. EXPLANATION OF COLUMNS. The following provides an explanation of columns found in the tabular listing: Column (1) - National Stock Number. Indicates the national stock number (NSN) assigned to the item and will be used for requisitioning purposes. Column (2) - Description, CAGEC, and Part Number. Indicates the Federal item name and, if required a minimum description to identify and B-2

SW370-A3-OPI-010

locate the item. The last line for each item indicates the Commercial and Government Entity Code (CAGE) followed by the part number. Column (3) - Blank Column (4) - Unit of Measure (U/M). Indicates how the item is issued for the NSN shown in column one. Column (5) - Quantity Required (Qty RECM). Indicates the quantity of the item authorized to be used with/on the equipment.

B-3

SW370-A3-OPI-010

Section II. Additional Items List. (1) National Stock Number


1005-00-193-3306

BAG, PROTECTIVE: for 30 round magazine (500 per box) required 1 per magazine BLANK FIRING ATTACHMENT M23: (For Training Only) (Carbine Only) (Yellow) (19200) 12597837 BOTTLE ASSEMBLY CYLINDRICAL (19204) 8448444 BRUSH, CLEANING, SMALL ARMS: bore (19204) 11686340

1005-01-361-8208

1005-00-242-5687

1005-00-903-1296

B-4

(3)

(4) U/M

(5) Qty RECM

BX

1

EA

1

EA

1

EA

1

SW370-A3-OPI-010

(1) National Stock Number 1005-00-999-1435

1005-00-494-6602

5340-00-880-7666 8465-00-781-9564

(2) Description, CAGEC, and Part Number BRUSH, CLEANING, SMALL ARMS: chamber (19204) 8432358 BRUSH, CLEANING, SMALL ARMS: tooth (19204) 8448462 CAP, PROTECTIVE DUST (19204) 8445067 CASE, Maintenance equipment for weapons without buttstock stowage (Carbine only) (81349) MIL-C-43737

B-5

(3)

(4) U/M

(5) Qty RECM

EA

1

EA

1

EA

1

EA

1

SW370-A3-OPI-010



1005-01-113-0321

HANDLE SECTION, CLEANING ROD, SMALL ARMS (19204)8436776 MAGAZINE, CARTRIDGE: 30 round (19204) 8448670 ROD SECTION, CLEANING ROD, SMALL ARMS (19204) 8436775 SWAB HOLDER SECTION, CLEANING ROD, SMALL ARMS (19204) 11686327 TOP SLING ADAPTER KIT (19204) 8448471 MTOE AUTHORIZED ITEMS

1005-00-921-5004 1005-00-050-6357

1005-00-937-2250

1005-00-406-1570

B-6

(3)

(4) U/M

(5) Qty RECM

EA

1

EA

6

EA

3

EA

1

EA

1

SW370-A3-OPI-010

(1) National Stock Number 1005-00-017-9701

1005-01-227-1739

(2) Description, CAGEC, and Part Number BAYONET - KNIFE M7 W/SCABARD (19204) 8427025 BAYONET - SYSTEM, M9 MULTIPURPOSE 12011861 M9 P/N

B-7/(B-8 BLANK)

(3)

(4) U/M

(5) Qty RECM

EA

1

EA

1

SW370-A3-OPI-010

APPENDIX C EXPENDABLE/DURABLE SUPPLIES AND MATERIALS LIST Section I. Introduction. C-1. SCOPE. This appendix lists expendable supplies and materials you will need to operate and maintain the MK 18 MOD 0 5.56MM Carbine. C-2. EXPLANATION OF COLUMNS. The following provides an explanation of columns found in the tabular listing:

C-1

SW370-A3-OPI-010

Column (1) - Item Number. This number is assigned to the entry in the listing and is referenced in the narrative instructions to identify the material (e.g., “Use wiping rag, item 9, App C). Column (2) - Level. This column identifies the lowest level of maintenance that requires the listed item. Column (3) - National Stock Number. This is the National Stock Number (NSN) assigned to the item; used to request or requisition the item. Column (4) - Description, CAGEC and Part Number. Indicates the Federal Item Name and, if required, a description to identify item. The last line for each item indicates the Contractor and Government Entity Code (CAGEC) in parentheses followed by the part number. Column (5) - Unit of Measure (U/M). Indicates the measure used in performing the actual maintenance function. This measure is expressed by a two-character alphabetical abbreviation (e.g., ea., in., pr.). If the unit of C-2

SW370-A3-OPI-010

measure differs from the unit of issue, requisition the lowest unit of issue that will satisfy your requirements. (1) Item Number

(2) Level

1

C

2

C

3

C



9150-01-102-1473 CLEANER, LUBRICANT AND PRESERVATIVE (CLP): 1/2 oz bottle (81349) MIL-L-63460 9920-00-292-9946 CLEANER, TOBACCO PIPE: cotton tuft, wire core (32 per pack) (89666) DILLS PIPE CLEANER 6850-00-224-6656 CLEANING COMPOUND, CARBINE BORE (RBC): 2 oz bottle (81349) MIL-C-372

C-3

(5) U/M OZ

EA

OZ

SW370-A3-OPI-010

(1) Item Number

(2) Level

4

C

5

C

6

C

7

C



1005-00-809-2190 COVER, PROTECTIVE, CARBINE for M16 Series Carbines (25 per box) (19204) 8448213 6850-00-281-1985 DRY CLEANING SOLVENT (3.79l) 1 Gallon can (58536) 9150-00-292-9689 LUBRICATING OIL, ARCTIC WEAPONS (LAW) (1 quart can) (81349) MIL-L-14107 9150-00-935-6597 LUBRICATING OIL, WEAPONS (lsa): Semifluid, 2 oz., (59.15 ml) Plastic bottle (81349) MIL-L-46000

C-4

(5) U/M EA

GL

EA

OZ

SW370-A3-OPI-010

(1) Item Number

(2) Level

8

C

9

C

10

C



9150-00-889-3522 LUBRICATING OIL WEAPONS (LSA) Semifluid, 4 oz., (118.30 ml) Plastic bottle (81349) MIL-L-46000 7920-00-205-1711 RAG, WIPING: 50 lb bdl (58538) A-A-531 1005-00-912-4248 SWAB, SMALL ARMS CLEANING: cotton, 1 pkg (1000 per package) (19204) 11686408

C-5/(C-6 BLANK)

(5) U/M OZ

LB

EA

17722702-MK-18-OM

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