The Colt Combat Unit Carbine was developed with the aid of veteran U.S. Special Forces trainers. It is a 16.1 barrel rifle chambered in 223 Rem5.56 NATO. The Combat Unit Carbine features a collapsible butt stock and an ambidextrous safety. A full length picatinny rail allows for the mounting of optics and other accessories. Details ACTION Semi-Auto - FINISH Matte Black - STOCKFRAME Collapsible Folding Stock - STOCKGRIPS Magpul MOE SL Buttstock - WEIGHT 6.47 lbs. - CALIBERGAUGE 223 Rem 5.56 NATO - CAPACITY 301 - # OF MAGS 1 - MAGAZINE DESC 30 rd. Magpul PMAG - BARREL 16.1 - RATE-OF-TWIST 1-in-7 - RECEIVER Matte Black - SAFETY Ambidextrous Safety Selector - ADDL INFO Magpul MOE SL Handguard Magpul MOE SL Pistol Grip Mid-Length Gas System