Fail Zero Bolt Carrier Group - 5.56mm Semi-auto Ar-15 Black

Fail zero bolt carrier group 5.56mm semi-auto ar-15 black

FEATURES
-Bolt & Extractor (5.56/.223 compatible)
-Bolt Carrier
-Extractor
-Cam Pin
-Carrier Key
-Firing Pin
-Black

Other Features: Semi-auto bcg, exo nickel boron treated with black topcoat/exterior, drop in install for most mil-spec ar15 uppers