CMMG Barrel with Bolt Carrier Group AR-15 5.7x28mm 16.1″ Stainless Steel Nitride | AMMO GATE

The CMMG 5.7x28mm Barrel and BCG Kit allows you to build an AR in 5.7x28mm using CMMGs patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your BCG but it results in less felt recoil than a straight b…