Cryptic 458 SOCOM/.450 Bushmaster Bolt Assembly - Complete

Bolt assembly machined from Mil-Spec Carpenter 158 steel, shot peened for increased strength per Mil-Spec, includes Mil-Spec 4140 billet tool steel extractor w/ spring and viton o-ring, Mil-Spec ejector and spring. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Comes Assembled. Specifications for Cryptic 458 SOCOM/.450 Bushmaster Bolt Assembly - Complete: - Manufacturer: Cryptic - Finish: Chrome Plated - Fabric/Material: 4140 Billet Tool Steel, Carpenter 158 Steel - Carrier Material: 8620 Steel - Bolt Material: Steel - Caliber: .458 SOCOM, .450 Bushmaster - Gun Make: AR Platform - Gun Model: AR-15 - Hand: Ambidextrous - Weight: 2 oz - Included Accessories: Standard Package Contents: - Cryptic 458 SOCOM/.450 Bushmaster Bolt Assembly - Complete - Bolt - Tool Steel Extractor Assembly (spring with viton insert pin extractor) - Ejector Assembly (ejector spring roll pin) - Gas Rings - Set of 3 What firearm models does the manufacturer say Cryptic 458 SOCOM/.450 Bushmaster Bolt Assembly - Complete is compatible with? The manufacturer suggests AR-15