Colt AR-15

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Colt AR-15
Complete AR-15A2 rifle set with manual, 5.56 mm ammunition and magazines
Type	Semi-automatic rifle
Place of origin	United States
Production history
Designer	Eugene Stoner, Jim Sullivan, Bob Fremont
Manufacturer	Colt
No. built	2 million +
Variants	see List of Colt AR-15 & M16 rifle variants
Specifications
Barrel length	20 inches (510 mm) (standard) 16 inches (410 mm) (carbine) 24 inches (610 mm) (target)
Cartridge	.223 Remington 5.56×45mm NATO
Action	Direct impingement
Effective firing range	~550 meters (600 yd)
Feed system	Issued with 5-, 10-, 20- & 30-round STANAG magazines
Sights	Fixed adjustable front and rear iron sights Detachable carrying handle with adjustable rear iron sight assembly Picatinny rails, which allows the use of various scopes and sighting devices

The Colt AR-15 is a lightweight, magazine-fed, gas-operated semi-automatic rifle. It is a semi-automatic version of the M16 rifle sold for the civilian and law enforcement markets in the United States. The AR in AR-15 stands for "ArmaLite Rifle", after the company that developed it in the 1950s.^[1] Colt's Manufacturing Company currently owns the AR-15 trademark for its line of semi-automatic AR-15 rifles.