CMMG 38CA61A AR MK3 Lower Parts Gun Builder kit 308 Lower Black

CMMG Mk3 Gun Builder's Kit: The Foundation for Your Custom .308 AR Platform Rifle For the dedicated firearm enthusiast, the precision builder, or anyone looking to construct their own high-performance AR-10 style rifle chambered in .308 Winchester, the CMMG Mk3 Lower Parts Gun Builder Kit (MPN: 38C