Upgrade your carrier with confidence today. Additionally, by completing your Bootleg, Inc. AR 10 Carrier with the Bootleg, Inc. .308 AR Carrier Completion Kit, is an investment in a product that is designed to exceed expectations. The kit is carefully crafted of components using premium materials to guarantee longevity and dependability. The firing pin retaining pin is made from 1038 steel wire for exceptional strength and resilience. The bolt is constructed from 9310 steel coated in phosphorus which is corrosive-resistance and durable. The cam pin is forged from 4340 steel and is known to enthusiasts for its outstanding toughness and wear resistance. The firing pin is made from 4140 steel for reliable ignition with every shot.