Technical data

TM 9-1005-319-23&P 0029
0029-8
GENERAL INSPECTION CRITERIA - Continued
Table 1. 5.56mm Rifle M16A2/M16A3/M16A4, M4/M4A1 Carbine - Continued.
Item Standard
Handguard .............................. Inspect handguard assembly for breaks, separations, and cracks. Breaks and
separations of material which prevent proper retention or interfere with
functioning of the weapon will be cause for handguard rejection and
replacement. Cracks up to 1 in. (2.54 cm) in length are acceptable provided
they do not extend into the handguard retaining flange (critical area).
M16A2 Rifle only:
Each handguard assembly may have up to two of the three front retaining
tabs missing. If all three front tabs are missing, the handguard assembly
must be replaced.
M16A3/M16A4 Rifle and M4/M4A1 Carbine only:
Inspect per item 3 in Preventive Maintenance Checks and Services (WP
0008).
All weapons:
Replace severely cracked handguards. Handguards that have a heat shield
loose enough to rattle when installed on the weapon must be replaced.
Stock assembly........................ Inspect buttstock assembly for dents, cracks, and chips. Check for breaks
and separation of material which could prevent proper functioning of
weapon.
1 v s 2 9 8
2
1
2
Figure 1. Buttstock Inspection.