AR-15 Bolt Carrier Group, Low Mass – .223
The 5.56/.223/ .300 AAC Low Mass Complete Bolt and Carrier Group is Nitride coated and Chrome Lined. The Carrier is made from 8620 steel, and the Bolt is made from 9310 steel and Nitride coated, MPI Tested. The 223 Bolt and Bolt Carrier Assembly comes complete with Cam Pin, Firing Pin and Firing Pin Retainer. Total weight 9.3888 ounces.