Firearms

Colt M16A1 5.56x45mm 20-inch

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Specifications

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Serial Number Data

Production data from factory records and collector research. Year ranges are approximate for pre-1968 firearms.

Years	Serial Range	Count	Factory	Country	Confidence

Vietnam-era standard US service rifle; successor to M14.

Type: Rifle

Action: Semi-Automatic

Caliber: 5.56x45mm NATO

Capacity: 20

Year introduced: 1967, USA

Weight: 72 oz

Overall length: 39.5"

Status: Discontinued

Military use: Yes

Intended use: Military