Upgrade with the CMMG Barrel and BCG Kit 4140CM SBN Drop in Barrel 5.7 x 28mm 5" Barrel Black — Cmmg Inc. quality components that install clean and hold up to real use.

The 5” 5.7x28mm Barrel and BCG Kit allows you to build an AR in 5.7x28mm using CMMG’s patented Radial Delayed Blowback operating system.

Order online from Dawson Defense — accessories ship straight to your door.