Technical data

TM 9-1005-319-23&P 0005

0005-6

M16 SERIES RIFLE/M4 SERIES CARBINE - Continued

Table 1. Troubleshooting Procedures - Continued.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

5. FAILURE TO FIRE - Continued.

Step 2. Inspect for broken hammer (10).

Replace hammer (WP 0021 and WP 0023).

Step 3. Inspect for broken hammer spring (9).

Replace hammer spring (WP 0021 and WP 0023).

Step 4. Check for improper assembly of hammer spring (9).

Assemble properly (WP 0023).

Step 5. (M16A2, M16A4, and M4 Only) Determine if burst cam (12) and/or burst cam spring (11)

is frozen or improperly assembled.

Disassemble, clean, lubricate, and reassemble correctly (WP 0023).

1 v s 0 1 1

1 1

1 2

1 0

M 1 6 A 2 , M 1 6 A 4 , a n d M 4 O n l y

M 1 6 A 3 a n d M 4 A 1 O n l y

Figure 8. Hammer and Burst Cam Inspection.