Stock Status: Prime Complete AR15 BCG 5.56 / .223 - Black Nitride
The best BCGs for replacement parts and builds have strong and dependable carriers with trusty bolt assemblies that cycle reliably. That's exactly what you'll get with this high quality complete BCG. Prime Manf M16 bolt carrier groups undergo black nitride process, producing a beautiful finish and reducing the friction coefficent. The carrier is made from 8620 steel. The bolt is 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 223 Bolt and Bolt Carrier Assembly is compatible with 5.56 NATO and 300 Blackout.
- 9310 Vac-Arc Premium Carburizing Steel (Bolt)
- 8620 Tool Steel (Carrier)
- Mil-Spec Extractor Spring, black extractor insert, Viton O-Ring
- Tool Steel Extractor
- Shrouded Firing Pin
- Mil-Spec Gas Key (4140 Steel) attached with Grade 8 hardware and heavily staked
- Caliber: .223 / 5.56 / 300 Blackout
- Bolt is shot Peened and MPI
- Carrier has flats or is "Facetted"
