Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced.
AR Barrels
CMMG BBL 300BLK 16.1″ MT 4140CM SBN
$211.82
CMMG BBL 300BLK 16.1″ MT 4140CM SBN
Availability: 2 in stock
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