Description
BCM®M4 UPPER RECEIVER ASSEMBLY•Built to the correct Mil-Specs •Precision machined 7075-T6 aluminum forging •Fully-assembled w/forward assist & ejection port cover •Mil-Std 1913 top rail •M4 barrel extension ready •Laser etched T-markings •Hard Coat Anodized per Mil-A-8625F Type III Class2 •Dry Film Lube on interior bore per Mil-Specs •Made in the USA
