Description
CMMG 30DF80A Barrel Sub-Assembly MR 300 Blackout 16.1″ AR-15 4140 Chrome Moly Steel Black Nitride Carbine Length Multi Role Profile
CMMG’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 5/8×24″ threads.






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