Built on a patented self-regulating short-stroke gas piston system, machined from aerospace-grade steel alloys. Dual control fully ambidextrous lower receiver includes bolt catch and release, magazine release and fire control access from both sides. Low profile, two-position, adjustable gas block and SPR style rail system. NiCorr treated cold hammer forged spiral fluted barrel. Features include Skirmish back up iron sights, ambidextrous charging handle, adjustable compact stock, Magpul MOE grip and LWRCI high efficiency 4-prong flash hider. Modular rails on sides and bottom of handguard. Threaded barrel with 1/2×28 TPI. 1:7 inch right hand rifle twist.