Cryptic AR15 M16 M4 Full Auto Bolt Carrier Group 6.8 SPC 224 Valkyrie 338 Spectre

Cryptic AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group Dragon's Breath. Coated bolt carrier group (full auto version) for AR15 M16 or M4 machined from Mil-Spec 8620 aircraft quality steel with shrouded firing pin and Mil-Spec chrome lined interior. BCG includes the proper chrome lined and heat treated gas key. Gas key is secured to carrier with Grade 8 fasteners and properly staked per Mil-Specs. This ensures a strong staking and proper gas system functioning. The bolt assembly is CNC machined from Mil-Spec Carpenter No. 158 steel and shot peened for increased strength per Mil-Spec; includes tool steel extractor with spring and viton O-ring; firing pin chromed finished with firing pin retaining pin and cam pin. HPT (High Pressure Batch Tested) and MPI (Magnetic Particle Inspected). Specifications for Cryptic AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group: Manufacturer: Cryptic Color: Dragon's Breath Finish: Matte Caliber: .338 Spectre .224 Valkyrie 6.8mm Remington SPC Gun Make: AR Platform Gun Model: M16 M4 AR-15 Features of Cryptic AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group Mil-Spec BCG Machined from 8620 Aircraft Quality Steel and heat treated to 60-61 RC Mil-Spec Chrome Lined Carrier Interior Mil- Spec Chrome Lined Gas Key Key Staked with Grade 8 Screws per Mil-Spec Mil-Spec Carpenter 158 Bolt w/ Spring and Ejector Tool Steel Extractor w/ Spring and viton O-ring Mil-Spec Firing Pin w/ Chrome Finish Mil-Spec Cam Pin Full Auto Carrier (Backward compatible with all semi-auto rifles) Package Contents: Cryptic AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group What firearm models does the manufacturer say Cryptic AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group is compatible with? The manufacturer suggests that Cryptic AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group is compatible with AR-15 M4 M16Cryptic CC-0810: AR15/M16/M4 6.8 SPC/224 Valkyrie/338 Spectre Bolt Carrier Group Dragon's Breath