CMMG 5.7x28mm 5" Barrel and BCG Kit 4140CM Steel for AR Rifles

The CMMG Barrel and BCG Kit in 5.7x28mm is a remarkable addition for those looking to build a lightweight and efficient AR platform. This 5" barrel, crafted from durable 4140CM steel and finished in sleek black, is designed to integrate seamlessly with both CMMG's Mk57 lower receiver and standard Mk4/AR-15 lower receivers when paired with CMMG 5.7 AR Conversion Magazines. Utilizing CMMG's innovative Radial Delayed Blowback operating system, this kit not only minimizes the weight of the bolt carrier group but also significantly reduces felt recoil compared to traditional direct blowback systems. This feature enhances shooting comfort and accuracy, making it an ideal choice for both competitive shooting and recreational use. The precision engineering of the barrel ensures reliable performance and consistent accuracy, allowing you to make the most of the 5.7x28mm caliber. Whether you are a seasoned hunter or a range enthusiast, the CMMG Barrel and BCG Kit provides the versatility and reliability needed for a superior shooting experience.