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The Aero Precision upgraded nickel boron bolt carrier group is an eye catching addition to your AR build. Mil-spec dimensions and coating ensure the highest quality and correct component interface.
- Machined from 8620 tool steel (M16/Auto Carrier) and 9310 Carpenter Steel (Bolt)
- Shrouded firing pin
- Nickel boron coating inside and out (Bolt, Carrier, and Gas Key)
- Forged Mil-Spec gas key attached with Grade 8 hardware and properly staked.
- 5.56 Bolt is shot peened and Magnetic Particle Inspected (MPI)
- Mil-Spec extractor spring, black extractor insert, Viton O-Ring
- Tool steel extractor
- High quality nickel boron BCG made in USA.