Daniel Defense's MK18 Pistol is a variation of the MK18 SBR. It is equipped with a SB-Tactical SOB Pistol Stabilizing Brace and a Daniel Defense pistol grip with an integral trigger guard and soft touch overmolding. The direct impingement, carbine length, low profile gas block is CNC machined from 4140 hardened steel with a Mil-Spec heavy phosphate coating. Its 10.3" barrel is constructed of chrome moly vanadium steel that is chrome lined with a heavy phosphate coating and a nitride finished flash suppressor. The Mil-Spec upper and lower receivers are CNC machined of 7075-T6 aluminum, with a hard coat anodized finish. The MK18 pistol's handguard is also CNC machined from 6061-T6 aluminum, with a hard coat anodized finish and rail panels made from heat resistant Santoprene.