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This is our DPMS compatible 308 Bolt Carrier Group Nickel Boron coated
- 4340 Steel Cam Pin Nickel Boron Coated
This Bolt Carrier group is diamond coated giving it the highest yield strength on the market with a rockwell over 90
The Nickel Boron coating has a Rockwell hardness between 52-56
- C158 Bolt (mil-spec)
AR15/M16 - 5.56 / 9310 Bolt Carrier Group Nitride QPQ 308bcg This is our DPMS compatibleCarrier 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
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