Premium Nitride MPI 5.56/.223 AR-15 Bolt Carrier Group (BCG)

Premium Nitride MPI 5.56/.223 AR-15 Bolt Carrier Group (BCG)
Product Specs:

.233/5.56 NATO (Other Standard Rounds As Well)
Ground & polished
Salt bath nitride finish
M16 cut
8620 steel carrier
9310 steel bolt
4140 steel extractor
MIL-SPEC O-ring
MIL-SPEC gas rings
4140 steel cam pin
8740 steel firing pin with hard chrome finish
Magnetic particle inspected
Proudly made in the U.S.A.