Black oxide finish Serrated upper hand guard for positive grip Lower hand guard with stainless steel heat shield and tactical pistol grip Modular Rear Trunnion (compatible with pig-nose adapter utilizing two 10-32 screws) Hinged dust cover 4-piece muzzle brake with chrome-lined funnel Fully Heat-Treated, Mil-spec stamped Receiver 4150 Nitride Barrel (8.5” length), 24×1.5 RH FORGED Trunnion FORGED bolt FORGED carrier with chrome-lined piston Spring-loaded firing pin Machined scope mount side rail Gas block/Front sight combo Bolt hold open safety lever Extended magazine release Magazine Capacity: 30 Semi-automatic closed-bolt action Caliber: 7.62 x 39 mm