AR10 (.308 Caliber) Bolt Carrier Group Nitride QPQ bcgcomponents - 4140 Steel Billet Machined

- 4140 Steel Billet Machined Gas Key Nickel Boron Coated

Carrier made with 8620 Steel and bolt made from mil-spec Carpenter 158 Steel

- Bolt engraved with MPI/9310

4140 Steel Gas Key Nitride QPQ

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

AR10 (.308 Caliber) Bolt Carrier Group Nitride QPQ bcgcomponents - 4140 Steel Billet MachinedThis is our AR10 Nitride Treated Bolt Carrier Group. This comes fully assembled and ready to drop into your AR Build. Nitride coating provides not only a high core strength but give the Bolt Carrier group a tough exterior coating. The rockwall rating on this Nitride Treatment is 75 giving it a high wear resistance and made to take a beating. This is a DPMS compatible Bolt Carrier group and comes oiled but it is recommended to keep this BCG clean and