Description
Mil-Spec BCG – MPI M16 BCG (5.56)
This M16 bolt carrier group drops right into your M16, AR15 or M4 platform rifle and features:
- Enhanced 9310 steel (bolt)
- 8620 tool steel (carrier)
- Chrome lined carrier (auto)
- Chrome lined gas key
- S7 tool steel extractor
- Mil-spec extractor spring, black extractor insert, Viton O-ring
- Shrouded firing pin
- Mil-Spec gas key (4130 Steel) attached with Grade 8 hardware and properly staked
- Bolt is shot peened and MPI
