New! Cryptic AR15/M16/M4 7.62x39mm/6.5 Grendel Type I Low Mass Steel Bolt Carrier Group Up to $15.60 Off w/ Free Shipping — 6 models

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 7.62x39mm/6.5 Grendel Type I Low Mass Steel Bolt Carrier Group:

Features of Cryptic AR15/M16/M4 7.62x39mm/6.5 Grendel Type I Low Mass Steel Bolt Carrier Group

• Mil-Spec CNC Machined from 8620 Tool Steel case hardened to 58 60 rockwell with chrome lined interior
• Mil- Spec Chrome Lined Gas Key
• Key Staked with Grade 8 Screws, per Mil-Spec
• Mil-Spec Carpenter 158 Bolt
• Mil-Spec Ejector w/ Spring
• Mil-Spec Extractor w/ Wolff Spring, viton O-ring and insert
• Mil-Spec Firing Pin w/ Chrome Finish
• Mil-Spec Cam Pin

Package Contents:

• Cryptic AR15/M16/M4 7.62x39mm/6.5 Grendel Type I Low Mass Steel Bolt Carrier Group

What firearm models does the manufacturer say Cryptic AR15/M16/M4 7.62x39mm/6.5 Grendel Type I Low Mass Steel Bolt Carrier Group is compatible with?