Technical data

TM 9-1005-319-23&P 0009
0009-6
TEST AND INSPECTION - Continued
M16A3 and M4A1 ONLY
i. Place selector lever in AUTO position. Charge weapon and pull trigger. Hammer should fall.
j. Hold trigger to the rear, charge weapon, and release trigger. Pull trigger. Hammer should not fall.
AUTO sear should have released hammer as the bolt closed.
ALL WEAPONS
k. With hammer in forward position, attempt to place the selector lever in the SAFE position. If
selector lever can be placed on SAFE, repair (see WP 0021).
8. Perform the following additional functional checks and adjustments on assembled weapon:
a. Press magazine catch button. Make sure it functions properly.
b. Press bolt catch. Make certain it operates smoothly and holds bolt in open position.
c. Inspect front sight and rear sight assembly. Make certain they can be adjusted properly.
d. Actuate forward assist assembly. It must work freely.
e. Inspect upper receiver and barrel assembly. Barrel assembly should not rotate within upper
receiver assembly.
f. Check that third or middle slot of compensator is straight up at top dead center (TDC).
9. Test trigger pull as follows:
M16A2, M16A4, and M4 ONLY
a. Clear the weapon. Place selector lever in BURST position. Pull the trigger and hold it to the rear.
Pull the charging handle to the rear and return to the bolt closed position three times. (This will
place the BURST disconnector in the deep notch of the BURST cam.)