The CMMG AR-15 Barrel 16″ -5.56NATO is perfect for building your custom AR15 upper group. Comes with a properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. This barrel is designed as a Mid length gas with a 1/2×28 thread pitch for muzzle devices. The barrel is made with a 1:7 twist and set up for the gas block section sized for a .750″.
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