Colt Canada C7 in service with Canadian Armed Forces with 20-inch barrel, ELCAN scope, and Diemaco-influenced improvements over standard M16A2. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 1984, USA Weight: 75 oz Overall length: 39.5" Status: Active Military use: Yes Intended use: Military