CMMG BBL AND BCG KIT 5″ 5.7X28MM

The CMMG 5” Barrel and BCG Kit in 5.7x28mm is a high-performance solution for building a lightweight, low-recoil AR-style rifle. Featuring CMMG’s patented Radial Delayed Blowback system, it reduces recoil and provides a smoother shooting experience compared to traditional blowback systems. The 5-inch barrel is optimized for compact builds while maintaining excellent accuracy. Compatible with CMMG Mk57 lowers or standard AR-15 lowers using CMMG 5.7 AR Conversion Magazines, this kit offers versatility and reliability. Made from durable 4140CM steel with a Super Black Nitride finish, it ensures longevity and corrosion resistance for superior performance.