Nomenclature Crossreference List

Common Name Official Nomenclature

Action Spring Helical Compression Spring (8448629)

Bolt Catch Spring Helical Compression Spring (8448633)

Carrier Key and Bolt Carrier Assembly (8448505)

Disconnector Spring Helical Compression Spring (8448594)

Ejector Spring Helical Spring (8448516)

Extractor Spring Assembly Spring Assembly (8448755)

Hammer Spring Helical Torsion Spring (8448611)

Magazine Catch Spring Helical Compression Spring (8448637)

Pistol Grip Rifle Grip (9349127)

Pivot Pin Detent Takedown Detent (8448585)

Trigger Spring Helical Torsion Spring (8448593)

Weapon 5.56mm Rifle M 16 (8448600) or M 16A1 (8448500)

1-6. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS (EIR). If your rifle needs improvement, let us know. Send us an EIR. You, the user, are the only one who can tell us what you don't like about your equipment. Let us know why you don't like the design. Put it on SF 368 (Product Quality Deficiency Report). Mail it to us at Commander, US Army Armament, Munitions and Chemical Command, ATTN: AMSMC-QAD-I, Rock Island, IL 61299-6000. We'll send you a reply.

Air Force users submit Materiel Deficiency Report (MDR) to: DIR MAT MGT ROBINS AFB GA//MMlBTC// and Product Quality Deficiency Report to: DIR MAT MGT ROBINS AFB GA//MMQA// IAW Technical Order 00-35D-54.

Coast Guard users submit PQDRs (SF 368) in accordance with COMDTINST M4855.1 to: Commandant, U.S. Coast Guard (G-ODO-2), Washington, DC 20593-0001.


a. Characteristics.

(1) Lightweight (4) Magazine-fed

(2) Air-cooled (5) Semi or automatic fire

(3) Gas-operated b. Capabilities. Provides personnel an offensive/defensive capability to engage targets while in the field role.

c. Features.

(1) Receivers are made of light-weight aluminum alloys; however, the safety, durability, and function of the rifles are in no way reduced. The portability and logistical values are greatly increased, particularly when air transport is used.

(2) The bolt locking action is one of the mechanical features of the weapon. The bolt and barrel extension contains locking lugs which engage and lock the bolt firmly in the barrel extension. The initial force of the explosion of the cartridge propellant is absorbed by the barrel, barrel extension, and bolt.

(3) The trigger guard is easily adaptable to winter operations. A spring-loaded retaining pin is depressed to allow ready access to the trigger when wearing arctic mittens.

(4) The ejection port cover prevents dirt or sand from getting into the ejection port, The cover must be closed during periods when firing is not anticipated. It opens automatically by the forward or rearward movement of the bolt carrier.

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