This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec AR-15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both wear and corrosion resistance.
Features:
- Nickel boron treated
- Extreme durability
- Dry lubricity
- Corrosion resistant
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