Colt SOCOM Carbine AR15 5.56mm NATO/223 Remington 16.1in Black Semi-Auto Modern Sporting Rifle - 30+1 Rounds - The Colt Carbine was designed specifically for lightweight mobility, speed of target acquisition, and potent firepower capability. It is ideal for tactical deployment and traditional patrol. With the 4-position buttstock fully retracted, the Colt Law Enforcement Carbine is less than 30.5in in length and weighs only 7 lbs. Features include an adjustable-post front sight, BUIS rear sight, side sling swivel at the gas block, and ambidextrous safety. The 1in" heavy barrel is chrome-lined with a 6-groove, 1: 7in twist. The Carbine AR15 has M4 feed ramps, an M16-type bolt carrier, and an H2 buffer. Sights: Adjustable Front Post / Flip-Up Rear, Adjustable Front Post / Magpul MBUS Flip Up Rear Direct Gas System Action Locking Bolt Chrome Lined Barrel