M16 profile Bolt Carrier Group. BCG
Specifications
Caliber
-5.56/.223
Carrier
-M16 Profile
-8620 Steel
-Heat Treated
-Black Nitride Finish
Bolt
-9310 Steel
-Heat Treated
-MPI Tested
-Black Nitride Finish
Gas Key
-4140 Steel
-Black Nitride Finish
Firing Pin
-8640 Steel