AT3(TM) AR-15 Bolt Carrier Group Black Nitride - .223/5.56 NATO .300 Blackout .350 Legend

AT3 Tactical is bringing you the best with this Top-Tier Black Nitride Bolt Carrier Group Getting a high quality bolt carrier group (BCG) that runs well in your rifle is absolutely critical. AT3 offers this BCG with a black nitride finish, which reduces friction and increases surface hardness for a lifetime of use. The carrier [...]