CMMG

Our MkGs Barrel and BCG Kit allow you to build a Pistol Caliber Carbine using our Patent Pending Radial Delayed Blowback System. Unlike typical direct blowback systems our RDB uses a bolt that is forced to rotate and unlock slowing the BCG. This results in a lighter BCG for a lighter rifle and less felt recoil than a straight blowback system. - 5 Medium Taper - 1:16 Twist - 4140 Chrome Moly - Salt Bath Nitride Finish inside and out - 40 S&W Chamber - Threaded .578-28 - Radial Delayed Blowback Bolt (Patent Pending) - Requires enlarged ejection port for reliable operation. - Weight: 1.7lbs