Colt Defense CR6762-EPR: Features - Direct gas impingement semiautomatic Colt M4 Carbine - 16.1 Chrome Lined Steel Barrel - Extended Centurion handguard with QD sling mounts with M-LOK slots for any added accessories. - Flat-Top Upper Receiver with Magpul Mbus Pro Series Front and Rear Sights - Features B5 Bravo Buttstock with QD sling mount - Ambidextrous Safety Selector - Caliber 7.62x39mm - Capacity 30+1 - Barrel Material / Finish Carbon Steel Mag Phosphate - Barrel Technical 1:12 RH 4 Groove - Barrel Length 16.1 - Overall Length 32-35.5 - Unloaded Weight 6.6 lbs - Safety Ambidextrous Safety Selector - Receiver Material 7075-T6 Aluminum - Receiver Finish Black Hardcoat Anodize - Action Type Semi-Auto - Trigger Type Single Stage - Grip A2 Pistol Grip - Stock B5 Bravo Buttstock w/ QD Sling Mount - Included Accessories 30-rnd Magazine User Manual Cable Lock