The LWRCI proprietary short-stroke Gas Piston operating system delivers unmatched reliability in extreme conditions and is easy to maintain. The MKII features include a Monoforge, one-piece upper receiver; ambidextrous operating controls including the bolt catch, bolt release, magazine release and safety selector, as well as the charging handle; LWRCI signature cold hammer forged spiral fluted barrel; nickel boron coated bolt carrier; LWRCI Skirmish BUIS; LWRCI compact stock and pistol grip. Includes 30rd Magpul 5.56 PMAG.