Carrier made with 8620 Steel and bolt made from 9310 Vac-Arc Premium Carburizing Steel which has a high core hardness and high fatigue strength unlike standard Hot/cold rolled 9310 steels. The nitride coating is the strongest plate available, it's the same protective finish that's used in gun barrels and CNC tool protection. If you're looking for a bolt carrier that's going to hold up against the roughest conditions then this bolt carrier group is the one for you.

- AR15 and M16 Compatible

- 8620 Steel Carrier Nitride Coated

- 9310 Vac-Arc Steel Bolt Nitride Coated

- 4340 Steel Cam Pin Nitride Coated

- 4140 Steel Gas Key Nitride Coated

- Tool Steel Extractor Nitride Coated

- Shot Peened

- MPI (Magnetic Particle Inspected)

- HPT (High Pressure Tested)

- Gas key staked to Mil-Spec Standards

- Grade 8 Hardened Fasteners

- Extractor Insert with upgraded Crane O-Ring

- Power Spring Kit

- Bolt engraved with MPI/9310