CMMG AR-15 5.7x28 CM Barrel w/ Bolt Carrier Kit

The CMMG® AR-15 5.7x28 Barrel Kit w/ Bolt Carrier is perfect when building an AR that uses CMMG’s patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your bolt carrier group, but it results in less felt recoil than a straight blowback system without sacrificing key features like last round bolt hold open. This barrel features 4140 chrome moly vanadium steel construction with a corrosion-resistant salt bath nitride finish. Includes bolt carrier.