Upper Receiver: Bolt Carrier Group: Gas System
Lower receiver: Trigger Group
4 major component groups of the m16 and there importance
Lower Receiver AssemblyUpper Receiver AssemblyBolt and Bolt Carrier AssemblyMagazine Group Assembly
You are describing a detachable magazine, such as used by the M9 pistol or M16 rifle.
Magazine assembly
magazine
The M16 assault rifle is chambered for the 5.56x45mm NATOintermediate rifle cartridge. It can also accept .223 Remington rounds.
Class VII, Major End Items, is the only one it really fits in.
Nobody. The M16 is not a sniper rifle, and it did not enter production until 1960.
Magazine
1959
The M16 sieries of rifles are individual combat weapons.
The weight of an M16 rifle without a magazine or sling is approximately 7.2 pounds.