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Mfg Item #: CMM30DF80A
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 5/8x24" threads.
| Caliber | .300 AAC BLACKOUT |
|---|
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