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The 5.56/.223/ .300 AAC Low Mass Complete Bolt and Carrier Group is Nitride coated. 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.
- BOLT: Made From 9310 Steel
- BOLT FINISH: Nitride
- CARRIER: Carrier Assembly Made From 8620 Steel, light Weight
- CARRIER FINISH: Nitride
- TREATMENT: Non RF85
- COMPATIBLE: AR-15 Platform, 5.56, .223, .300 BLK
- ADDITIONAL SPECS/NOTES: Drop In Ready, MPI Tested
- WEIGHT: 9.3888 ounces