Bolt CarrfEr Assembly Cont

location item action remarks

Bolt Assembly

Test firing pin hole for elongated and oversized holes.

Auto Bolt Carrier

Bolts that have elongated or oversized holes that permit special not-go plug gage 12620101 to penetrate fully at any position on the circumference of the firing pin hole wiil be rejected.

FIRING PIN

Bolt assembly

FIRING PIN

PROTRUSION GAGE

Cal Firing Pin Protrusion Gauge

FIRING PIN

Replace bolt assembly if firing pin hole is enlongated or oversized.

Using firing pin protrusion gage 7799735, check for proper firing pin protrusion.

Insert firing pin through bolt assembly.

Firing pin should touch the gage on minimum but should not touch on maximum.

Replace defective firing pin.

BOLT ASSEMBLY

Bolt Carrier Assembly All authorized items

Replace if unserviceable.

NOTE

Be sure to retest firing pin, bolt carrier and key, bolt assembly, bolt carrier assembly or bolt assembly.

3-14

TM 9-1005-249-24&P

location item action remarks

REASSEMBLY

Bolt Carrier Assembly a.

Bolt carrier and key (1) Instali and bolt assembly (2)

Install.

Install

Parts Bolt Carrier M16a1M16a1 Bolt Assembly

Install and rotate a quarter turn.

Hoid carrier with bolt assembly down and drop in firing pin.

d. Firing pin retaining pin (5)

Install.

Instali from the left side only to ensure proper installation of firing pin retaining pin. Attempt to shake out firing pin.

3-15

TM 9-1005-249-24&P

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