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

- 4140 Steel Billet Machined Gas Key Nickel Boron Coated

We use a 9310 Vac-Arc steel Bolt over the Mil-Spec Carpenter 158 Bolt because it's stronger and after many test firings and torture tests we've found it to not only last longer but to be more durable

This is our DPMS compatible 308 Bolt Carrier Group Nickel Boron coated

- Hard chrome lined Carrier and Gas Key

- Bolt engraved with MPI/9310

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