Experience enhanced reliability and performance with the Rosco Manufacturing Stainless Steel Black Phosphate Bolt Carrier. Crafted with precision this bolt carrier group features a durable black phosphate coating complemented by a chrome-lined gas key and bolt channel. Its full-auto rating and proper staking ensure optimal functionality while the meticulous matching of the bolts to the barrel enhances accuracy and efficiency. Made from robust stainless steel this bolt carrier is designed to withstand the demands of intense use making it a standout choice for those seeking superior durability and performance in their firearm components.