This Bolt Carrier group is diamond coated giving it the highest yield strength on the market with a rockwell over 90. Standard Nickel Boron coatings and Nitride treatments offer up to 72 rockwell ratings. This bolt carrier group is so strong that it's "SCRATCH RESISTANT!" It's machined and heat treated to Mil-Spec standards to the full auto design. Comes fully assembled and ready to drop into your standard or custom AR build.

- AR15 and M16 Compatible

- 8620 Steel Carrier DLC Coated

- 9310 Vac-Arc Steel DLC Coated Bolt

- 4140 Steel gas key DLC Coated

- 4340 Steel Cam Pin DLC Coated

- Tool Steel Extractor DLC Coated

- Shot Peened

- Extractor insert and Crane O-Ring upgrade

- Bolts are MPI/HPT

- Bolts Engraved with 9310/MPI