M16 Maintenance Manual TM9-1005-319-23.pdf - CombatRifle.net

ARMY TM 9-1005-319-23&P
AIR FORCE TO 11W3-5-5-42
9. Remove pin (1 9) using 3,32 Inch drive pin punch
and hand hammer .
WARNING
To avoid Injury to your eyes, use care when
removing and installing spring-loaded parts.
10. Remove forward assist assembly (20) and helical
spring (21) from upper receiver (8). For further
disassembly of forward assist assembly see page 3-
59.
b. INSPECTION
1. Check rear sight parts for serviceability. Inside of apertures should be round and distinct. Replace If defective
2. Visually inspect rear sight assembly helical springs (1) ball bearings (2), and helical spring (3) for breaks,
bends, and missing parts Ball bearings should be smooth and round. Replace If defective
3. Check upper receiver for cracks, corrosion, and damage Clear drain hole with a piece of wire. Repair (p 3-29)
or replace If defective.
4. Check that flat spring (4) retains sight aperture (5) firmly In either position. Replace flat spring (4) If sight
aperture is not firm.
3-51