16" | Cmmg Barrel | 300 BLACKOUT 1:7 | 416SS

16" | Cmmg Barrel | 300 BLACKOUT 1:7 | 416SS (CT35CMMG30DC30A) Product Description  Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly head spaced...