*BLEMISHED*PRIME COMPLETE AR15 BCG 5.56 / .223 - BLACK NITRIDE
***This Is a Limited Batch of High-Quality Bolt Carrier Groups with Minor Cosmetic Blemishes.***

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"