Technical data

TM 9-1005-319-23&P 0002
0002-3
Charging Handle Assembly (1)
This assembly provides a means of charging the weapon.
Bolt Carrier Assembly (2)
The bolt carrier assembly carries bolt assembly to chamber and fires the weapon. It contains the firing pin,
cartridge extractor, bolt assembly, cartridge ejector, and bolt cam pin.
M16A2 Upper Receiver and Barrel Assembly (3)
The upper receiver contains rear sight assembly, ejection port, ejection port cover, and a housing for the key
and bolt carrier assembly and bolt assembly. The rifle barrel assembly is air-cooled, contains compensator
and front sight assembly, and holds the two handguard assemblies and the sling swivel.
Magazine (4)
The magazine has a 30 cartridge capacity.
Lower Receiver and Buttstock Assembly (5)
The lower receiver contains the trigger assembly, sear, hammer assembly, selector lever, rifle grip, bolt
catch, and buttstock assembly. The buttstock assembly houses the action spring, buffer assembly, and
extension assembly.
Sling (6)
The sling is adjustable and provides a means to carry the weapon.
M16A3/M16A4 and M4/M4A1 Back-up Iron Sight (7)
The back-up iron sight contains rear sight assembly.
M4/M4A1 Upper Receiver and Barrel Assembly (8)
The upper receiver contains ejection port, ejection port cover, and a housing for the key and bolt carrier
assembly and bolt assembly. The carbine barrel assembly is air-cooled, contains compensator and front
sight assembly, and holds the two adapter rail assemblies (upper and lower) and the sling swivel with side
mount.
M16A3 and M16A4 Upper Receiver and Barrel Assembly (9)
The upper receiver contains ejection port, ejection port cover, and a housing for the key and bolt carrier
assembly and bolt assembly. The rifle barrel assembly is air-cooled, contains compensator and front sight
assembly, and holds the two adapter rail assemblies (upper and lower) and the sling swivel.