Whether you re looking to complete your Bootleg, Inc. AR 15 Carrier or you like to keep extra parts on hand, our carrier completion kit has what you need. Our carrier completion kit fits perfectly with our gas adjustable carrier group to give you better customization in gas suppression. Our firing pin retaining pin is made from 1038 steel wire, the bolt is 9310 steel coated in phosphorus, the cam pin is 4340 steel, and the firing pin is 4140 steel to ensure quality and durability. Complete your carrier with quality today! Features: All components made from steel for durability Fits with Bootleg adjustable gas carrier