CMMG Banshee MK4 Upper Group .300 BLK 12.5" - 30B8A6FAB

This is an AR-15 upper receiver assembly chambered in .300 BLK with a 12.5" barrel, designed for the Mk4 platform. The complete upper group includes a bolt carrier group, polymer dust cover, ambi charging handle, and linear compensator. Available in multiple Cerakote finishes, the upper arrives zeroed and ready for assembly.