The Daniel Defense MK18 Pistol is a variation of the MK18 SBR which has been extremely popular within the Law Enforcement and Special Operations communities. A newly designed Pistol Receiver Extension classifies it as a Pistol and not a Short Barreled Rifle(NFA regulated items require ATF approval and a tax stamp). The Daniel Defense MK18 features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged Barrel, the same length commonly used for CQB operations. The MK18 RISII features the Bolt-Up System and has been rigorously tested prior to fielding by USSOCOM. This pistol comes equipped with the rugged and comfortable Daniel Defense Pistol Grip with an integral trigger guard and soft touch overmolding. The MK18 Pistol by Daniel Defense is unmatched in size, weight, and performance.