Blt Assembly

This task covers:

a. Disassembly b. Inspection/Repair c. Reassembly

INITIAL SETUP

Tools

Small Arms Repairman Tool Kit SC 5180-95-CL-A07 (19204) M16 Series and M231 Firing Port Weapon Direct Support and General Support Maintenance for 5.56-mm Rifle Tool and Gage Set 8426685 (19204)

Materials/Parts Penetrant kil (ilem 14, app D) Wiping rag (item 15, app D)

location item action remarks

DISASSEMBLY

Using flat tip screwdriver, re- Do not remove unless rings move the three bolt rings from require replacement, the bolt.

Equipment Conditions

Page Condition Description

3-11 Bolt carrier assembly removed

3-11 Bolt assembly removed

Bolt Assembly

Bait rings and bolt

M16a1 Bolt Assembly

INSPECTION/REPAIR

Bolt Assembly a. Bolt ring

Visually inspect for cracks, kinks, and bends.

Replace if defective.

If one or more bolt rings are damaged, replace all three rings. See page 3-13 for wear check.

3-16 Change 2

location item action remarks b. Bolt Inspect bolt for elongated or oversized firing pin hole using special not-go plug gage 12620101.

Firing pin holes which permit the special not-go plug gage to fully penetrate at any position on the circumference will be rejected.

Bolt face defects of large pits, or a cluster of pits, covering an area measuring approximately 1/8 inch across and more than approximately 0.010 inch deep, will be cause for rejection.

Bolts that contain pits extending into the firing pin hole will not be rejected unless firing pin hole gaging check determines excess wear.

Rings on the bolt face (machine tool marks), grooves, or ridges less than approximately 0.010 inch will not be cause for rejection.

c. Bolt locking lugs and Inspect for cracks in the locking bolt cam pin hole iugs and cam pin hole area. Use black light if available; oli lorwise, use a glass of no more than 3X magnification or use a penetrant kit (item 14, app D).

Inspect for cracks (especially at base of locking lugs and cam pin hole area) using penetrant kit (item 14, app O) as follows:

The area to be inspected must be clean, free of oil, etc. Spray a small amount of remover on the area to be inspected, let dry, and wipe off with a wiping rag (item 15, app D).

Gun Silencer Diagram For Pistol

LOCKING LUG

CAM PIN

HOLE

3-17

TM 9-1005-249-24&P

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