Technical data

TM 9-1005-319-23&P 0005
0005-18
M16 SERIES RIFLE/M4 SERIES CARBINE - Continued
Table 1. Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
13. FAILURE TO CYCLE WITH SELECTOR LEVER SET ON AUTO (M16A3 AND M4A1 ONLY).
Step 1. Inspect for broken automatic sear (33) or automatic sear spring (32).
Replace automatic sear (WP 0021).
Step 2. Inspect for faulty selector lever (14).
Replace selector lever (WP 0021).
1 v s 0 2 6
3 3
3 2
1 4
Figure 24. Selector Lever and Automatic Sear Inspection.
Step 3. Check for short recoil.
See Malfunction 10.
14. FIRES TWO ROUNDS WITH ONE PULL OF TRIGGER WITH SELECTOR LEVER SET ON
SEMI (DOUBLE FIRING).
Step 1. Perform function test (WP 0009).
If any part of function test fails, continue with next step.
Step 2. Inspect for defective semiautomatic disconnector (30).
Replace semiautomatic disconnector (WP 0021).
Step 3. Inspect for worn or broken trigger notch (28) of hammer (10) (searing portion).
Replace hammer (WP 0021).
Step 4. Inspect for worn or broken disconnector hook (27) of hammer (10).
Replace hammer (WP 0021).