Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. ALL NFA RULES APPLY
CMMG BBL 300BLK 8″ 4140CM SBN
CMMG BBL 300BLK 8″ 4140CM SBN
$184.57
CMMG BBL 300BLK 8″ 4140CM SBN
Availability: 8 in stock
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