CAR-15 XM177
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The Colt Automatic Rifle-15 or CAR-15 is a family of M16 rifle–based firearms marketed by Colt in the 1960s and early 1970s. However, the term "CAR-15" is most commonly associated with the Colt Commando; these select-fire carbines have ultrashort... Wikipedia
Barrel length: 10 in (250 mm) (XM177E1); 11.5 in (290 mm) (XM177E2)
Action: Gas-operated, rotating bolt (Direct impingement)
Effective firing range: 400 m (440 yd)
Feed system: 30-round box magazine or other STANAG magazines
In service: 1966–1998 (US Service); 1966–present (other countries)
Manufacturer: Colt Defense
Muzzle velocity: 2,650 ft/s (810 m/s) (XM177E1); 2,750 ft/s (840 m/s) (XM177E2)