CMMG 30DF80A Barrel Sub-Assembly 300 Blackout 16.10" Black Nitride Finish 4140 Chromoly Steel Material Carbine Length with Multi Role Profile for AR-15 Grips and Recoil Pads The custom-tuned tone board ensures

The custom-tuned tone board ensures flawless performance

ensures virtually effortless navigation even in total darkness

Shotgun QD Super Swivels mounts for most pumps and autos includes special adapter for Beretta 390 magazine cap also included for most pump and auto magazine caps

Bond Arms Back Up

Extremely loud

CMMG 30DF80A Barrel Sub-Assembly 300 Blackout 16.10" Black Nitride Finish 4140 Chromoly Steel Material Carbine Length with Multi Role Profile for AR-15 Grips and Recoil Pads The custom-tuned tone board ensuresCMMG's Barrel Sub Assembly is ideal for building your custom AR 15 upper group. It comes with properly installed M4 barrel extension. The barrel is constructed of 4140 chrome moly with a slat bath nitride finish and 5 8x24" threads.