LanTac USA Enhanced Bolt Carrier Group 5.56/.223, Black Nitride - 01-UP-556-NIT-EBCG

M16 full auto style enhanced bolt carrier group designed for 5.56/.223 AR-15 platforms. Precision machined from 8620 steel with shot peened bolt manufactured from Carpenter 158 or 9310 steel, magnetically particle inspected for quality. Features QPQ (Quench Polish Quench) black nitride coating that provides a hard, smooth surface with increased corrosion resistance and low coefficient of friction.