CMMG 33D190C Barrel Sub-Assembly 8.6 Blackout 16.10" Black Nitride 4140CM BarrelKick off the 8. 6 Blackout rifle build with a CMMG 16. 1" barrel featuring the sleek, corrosion resistant nitride finish. Compatible with CMMG Mk3 and DPMS Gen 1 High Pattern LR 308 upper receivers. Accepts 0. 750" diameter gas blocks.
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