BCG-458 : BCG COMPLETE NITRIDE FINISH

For 458 socom
Bolt carrier group includes:
 
Bolt assembly complete
M16 style carrier w/ properly staked gas key
Compatible w/ both semi/full auto configurations
Contains v seven improved cam pin, firing pin, firing pin retaining pin
Finish is mil-spec manganese phosphate
Weighs approx. 11.5 oz
 
Ar-15/m16 bolt
Constructed from carpenter 158 alloy
Finish is mil-spec manganese phosphate
For 458 socom
Mpi/hpt tested for quality
 
Carrier
Constructed from 8620 alloy
Chrome lined bore
100% mpi tested