CMMG 55D590A 5.56mm MT Barrel Sub-Assembly

Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.

Barrels are the heart of a rifle or pistol, CMMG barrels are made with quality and precision as top priority. The 10.5'' 5.56mm barrel is no exception. Rest assured that all barrel sub-assemblies are...

Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. Made of 416 Stainless with an SBN Finish.

Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.

Perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced.