Technical data

TM 9-1005-319-23&P 0015
0015-8
INSPECTION — ACCEPTANCE AND REJECTION CRITERIA
2 n d R i b f r o m
R e a r t o t h e E n d
o f H a n d g u a r d
1 s t R i b
F o r w a r d
C r i t i c a l A r e a
( S h a d e d )
2 4
2 3
1 v s 1 1 2
Figure 12. Inspection of Handguard Assemblies.
1. Inspect handguard assemblies for breaks, separation, and cracks using the following guidelines:
a. Breaks and separations of material which prevent proper retention or interfere with functioning of
the weapon will be cause for handguard assembly rejection and replacement.
b. M16A2 handguard assemblies may have up to two of the three front retaining tabs (23) missing.
M16A3/M16A4 and M4/M4A1 may not have any front retaining tabs missing. If all front
retaining tabs for the M16A2 are missing, or any of the tabs for the M16A3/M16A4 or M4/M4A1
are missing, handguard assemblies must be replaced.
c. Cracks up to one inch in length are acceptable provided they do not extend into the retaining flange
(CRITICAL AREA) (24).
d. Replace severely cracked or damaged handguard assemblies. Handguard assemblies which have a
heat shield which is loose enough to rattle when installed on the weapon must be replaced. If
upper handguard assembly for M16A3/M16A4 rifle is damaged, see WP 0017 for repair. If upper
handguard assembly for M4/M4A1 carbine is damaged, see WP 0018 for repair.
2. Inspect front sight area for evidence of gas leakage around gas tube. Replace gas tube if short recoil
results from gas leakage.
3. Inspect gas tube for cracks. Replace if defective.
4. Inspect the forward assist for slippage or actuation of the pawl. Lubricate in accordance with TM 9-
1005-319-10 if pawl is not actuating. Open the action, pull the bolt and bolt carrier assembly slightly to
the rear, and, with a push or a tap on the forward assist, ensure the bolt is pushed into the locked
position. If forward assist does not perform this function properly, see WP 0019 and WP 0020 for
repair.