These upper receivers are fully assembled with forward assist and ejection port cover including Mil-Std 1913 Rail for mounting optics and accessories. Machined for use with barrels that use an M4 barrel extension and can be laser etched with T-markings for addressing the remounting of optics.

Includes Mil-Spec Forward Assist with heat treated tool steel pawl, with press fit and pinned cap and either hard coat anodized per Mil-A-8625F, Type III, Class2 or Cerakoted with your choice of color options.

As with all BCM® products, these are proudly Made in the U.S.A.