The Colt 6700 is the flat-top A3 variant of the Colt civilian AR-15 with a 20-inch barrel and no fixed carry handle — accepting optics via Picatinny rail. Features standard Colt mil-spec components in the full-size 20-inch configuration. The A3 designation indicates the flat-top optics-ready upper versus the fixed-handle A2. An important transitional Colt model bridging carry-handle and optics-ready eras. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 1992, USA Weight: 7.8 oz Overall length: 39.5" Status: Discontinued Intended use: Sport Shooting