JP Enterprises Enhanced Bolt Assembly .224 Valkyrie/6.8mm Remington SPC Black. Manufactured From Sae 9310 It Has A Drastically Extended Lifespan While Design Improvements Ensure Superior Function. The Enhancedbolt Is Compatible With Any Ar-15 Platform Using A Mil-Spec Bolt Carrier And 6.8 Spc Ii Or .224 Valkyrie Sub-Components. This Is A Type Ii Bolt Assembly And Conforms To Current Saami Spec. For The 6.8 Spc Ii Cartridge. Package Includes Bolt Assembly Specifications for JP Enterprises .224 Valkyrie Enhanced Bolt Assembly: Manufacturer: JP Enterprises Color: Black Fabric/Material: Steel Carrier Material: 8620 Steel Bolt Material: 9310 Steel Caliber: .224 Valkyrie 6.8mm Remington SPC Hand: Right Included Accessories: Standard Features of JP Enterprises .224 Valkyrie Enhanced Bolt Assembly: SAE 9310 steel construction for superior resiliency and extended lifespan; DLC coating provides extreme surface hardness and lubricity while maintaining a ductile core; Near frictionless surface finish; Fully compatible with Mil-spec sub-components; Increased diameter cam pin hole eliminates most common bolt breakages; Improved lug geometry for reduced wear and easier locking/unlocking; Enhanced Ejector mitigates head case extrusions and reduces brass smear; Enhanced Extractor optimizes extraction function and eliminates common ejection failures; Enhanced Gas Ring reduced internal friction and carrier wear while maintaining near indefinite gas seal Package Contents: JP Enterprises .224 Valkyrie Enhanced Bolt Assembly Cam Pin Firing Pin Firing Pin Retainer Pin Instruction Sheet JP Enterprises JPBC-EB6.8SPCII: Enhanced Bolt Assembly .224 Valkyrie/6.8mm Remington SPC Black