Nitrided M16 Bolt Carrier Group, made from 8620 steel, Bolt is made from 9310 steel MPI Tested. The 223 Bolt and Bolt Carrier Assembly comes complete with cam pin , firing pin and firing pin retainer.
Specifications and Features:
- 223 / 5.56 bolt assembly is compatible with .300BLK as well!
- Fully mil-spec construction
- Durable Nitride finish
- 9310 steel bolt is MPI tested
- 8620 steel full-shroud M16 style bolt carrier
- Properly staked gas key
This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. www.P65Warnings.ca.gov