Bravo Company Upper, Mil-Spec, 1913 Rail for Mounting Optics and Accessories, Flat Top, Black BCM4-UR-M4
<p>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 bor</p>
