Bootleg Inc Bolt Completion Kit .308 Black. 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 customizability 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 Specifications for Bootleg Inc Bolt Completion Kit: Manufacturer: Bootleg Inc Color: Black Finish: Phosphorus Fabric/Material: 4340 Steel 9310 Steel 4140 Steel Gun Make: AR Platform Gun Type: Rifle Condition: New Weight: 1 lb Features of Bootleg Inc Bolt Completion Kit 5.56/.308 Phosphate Complete Bolt Assembly Cam Pin Firing Pin and Firing Pin retaining Pin Uses all Standard Mil Spec components. Bolt 9310 (steel) Cam Pin 4340 (steel) Firing Pin 4140 (steel) Package Contents: Bootleg Inc Bolt Completion Kit What firearm models does the manufacturer say Bootleg Inc Bolt Completion Kit is compatible with? The manufacturer suggests that Bootleg Inc Bolt Completion Kit is compatible with AR-15 AR-10Bootleg Inc BP-ABC-P30: Bolt Completion Kit .308 Black