Cryptic .458 SOCOM / .450 Bushmaster Bolt Repair Kit Manganese Phosphate. 308 WIN / 7.62x51mm / 6.5 Creedmoor) Ejector Ejector Spring Ejector Roll Pin Gas Rings (3) Specifications for Cryptic .458 SOCOM / .450 Bushmaster Bolt Repair Kit: Manufacturer: Cryptic Fabric/Material: 4140 Billet Tool Steel Carpenter 158 Steel Caliber: .458 SOCOM .450 Bushmaster Features of Cryptic .458 SOCOM / .450 Bushmaster Bolt Repair Kit Cam Pin (Choice of coating) Extractor (Choice of coating) Extractor Pin Extractor Spring w/ Viton Insert O-Ring (Viton Insert not included with .308 WIN / 7.62x51mm / 6.5 Creedmoor) Ejector Ejector Spring Ejector Roll Pin Gas Rings (3) Package Contents: Cryptic .458 SOCOM / .450 Bushmaster Bolt Repair Kit Cryptic CC-RKB-0404: .458 SOCOM / .450 Bushmaster Bolt Repair Kit Manganese Phosphate