CMMG Dissent MK4 Upper Group 300 Blackout 16.1" Barrel, Black - 30B125BHCA

This is an AR-15 upper receiver group chambered in 300 Blackout featuring a 16.1" barrel designed for both subsonic and supersonic ammunition. The upper group uses CMMG's patent-pending direct impingement Compact Action system and is compatible with existing CMMG Dissent lower receivers or standard AR-15 builds without an AR buffer tube.