Technical data

TM 9-1005-319-23&P 0005
0005-4
M16 SERIES RIFLE/M4 SERIES CARBINE - Continued
Table 1. Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. FAILURE TO LOCK.
Step 1. Inspect for missing bolt cam pin (4).
Replace bolt cam pin (WP 0011).
Step 2. Inspect for damaged bolt carrier key (5).
Repair slightly dented bolt carrier key. Replace more seriously damaged bolt carrier key
(WP 0013).
Step 3. Inspect for loose screws (6) on bolt carrier key (5).
a. Disassemble and repair (WP 0013).
b. Reassemble using new screws.
1 v s 0 0 8
4
5
6
Figure 4. Bolt Carrier Assembly Inspection.
Step 4. Inspect for improperly assembled extractor spring assembly (7).
Assemble correctly (WP 0012).
1 v s 0 0 9
7
Figure 5. Extractor Spring Assembly Inspection.