Takedown Pin Diagram M16

When used on the M16A4 rifle, the leaf sight and rail grabber assembly will be attached to slot T38 on the M5 Adapter Rail System.

When used on the M4 or M4A1 carbine, the leaf sight and rail grabber assembly will be attached to slot T24 on the M4 Adapter Rail System.

25. Turn the torque knob of the assembly counterclockwise until it stops turning. Place the assembly on the upper rail and insure the recoil lug is seated in the correct slot. The torque knob should be to the left of the carbine or rifle. Turn the torque knob clockwise until you hear two clicks._

ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010

2-12. RECEIVER ASSEMBLY-MAINTENANCE INSTRUCTIONS.

This task covers:

a. Removal b. Disassembly c. Cleaning

INITIAL SETUP

Tools and Special Tools

(Army) Small Arms Repairman Tool Kit (item 5, app B) (MC) Small Arms Repairman Tool Kit (item 5, app B)

Materials/Parts

Cleaner, lubricant, and preservative (CLP) (item 5, app D)

Dry cleaning solvent (item 9, app D)

Rubber gloves (item 10, app D)

Self-locking screw (MS21262-5)

Wiping rag (item 17, app D)

References TM 9-1010-221-10

Equipment Condition

Grenade launcher installed on M16 series rifle. Sling and hand guard assembly removed.

REMOVAL

WARNING

Clear both weapons before starting an inspection and ensure the bolt of the rifle is forward.

Disengage trigger guard. Push receiver takedown pin (1) and receiver pivot pin out and remove lower receiver.

d. Inspection/Repair e. Lubrication/Reassembly f. Installation

M4a1 Receiver Pivot Pin Diagram

ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010

2-12. RECEIVER ASSEMBLY - MAINTENANCE INSTRUCTIONS (CONT).

DISASSEMBLY

The current configuration of the back plate and follower guide assembly is depicted above. The previous configuration follower guide assembly contained a captured spring and detent; therefore, it did not require a screw. The old-type back plate and follower guide assembly only need to be replaced if defective. If the old configuration of either the back plate or the follower guide assembly requires replacement, both parts must be replaced, as the old to new configurations are not compatible.

1. Cock the grenade launcher. Slide the barrel assembly (1) forward. Using allen wrench, remove and discard self-locking screw (2).

WARNING

To avoid injury to your eyes, use care when removing and installing spring-loaded parts.

2. Slide back plate (3) out of receiver assembly (4). Slide barrel assembly rearward and remove follower guide assembly (5).

M203 Diagram
NOTE

4. Squeeze trigger (7) to release firing pin.

3. Press barrel stop (6) and remove barrel assembly (1).

Homemade Grenade Launcher Diagram

ARMY TM 9-1010-221-23&P AIR FORCE TO 11W3-9-4-2 MARINE CORPS TM 07700A-23&P/2 NAVY SW 370-AE-MMI-010

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