The CMMG Barrel and BCG Kit 4140CM SBN Drop in Barrel 5.7 x 28mm 8" Barrel Black is a rugged, precise Cmmg Inc. component built to improve fit, feel, or function.

The 8" 5.7x28mm Barrel and BCG Kit is perfect for building an AR pistol or SBR in 5.7x28mm using CMMG’s patented Radial Delayed Blowback operating system.

In stock and ready to ship from Dawson Defense, an Arizona-owned licensed dealer.