M16 6.8 SPC Bolt Carrier Group features construction using both 8620 and 9310 steel.
The bolt face is constructed using the harder 9310 steel, which then undergoes heat treatment and shot peening.
The carrier itself is machined from hardened 8620 steel.
- Quality assured with magnetic particle inspection
- Rubber insert and spring included in extractor construction
- Matte-black nitride finish provides reduced friction and increased rust-resistance
- Properly torqued and staked gas-key screws
M16 6.8 SPC Bolt Carrier Group also comes complete with a firing pin, cam pin and firing-pin retaining pin.