Fail Zero Bolt Carrier Group 5.56MM Semi-Auto AR-15 Black
Type/Color: AR15 Complete Bolt Carrier Size/Finish: 5.56MM/Black Material: Steel AR-15 Accessory: Y Other FEATURES:: Semi-Auto BCG, EXO Nickel Boron Treated With Black Topcoat/Exterior, Drop In Install For Most Mil-Spec AR15 UPPERS
