COMPLETE 5.56 POLISHED BLACK NITRIDE BCG - PACK OF 3 Our Nitrided M16 BCG is micro polished before and after the Melonite process, producing a beautiful finish and an extremely slick surface. The carrier is made from 8620 steel. The bolt is made from 9310 steel and is MPI Tested and engraved. The 223 Bolt and Bolt Carrier Assembly is compatible with 5.56 and 300 Blackout.


Enhanced 9310 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 (4130 Steel) attached with Grade 8 hardware and Properly staked Caliber: .223 / 5.56 / 300 Blackout Bolt is shot Peened and MPI All BCG components pre polished before being processed and then post polished for an incredible shine