Nickel Boron MPI 5.56/.223/.300 Blackout/.350 Legend Bolt Carrier Group (BCG)
Specifications:
- Nickel boron finish
- M16 cut
- 9310 steel carrier
- Carpenter 158 steel bolt
- 4140 steel extractor
- MIL-SPEC O-ring
- MIL-SPEC gas rings
- 4140 steel cam pin
- 8740 steel firing pin with hard chrome finish
- Magnetic particle inspected
- Proudly made in the U.S.A.