Your Bolt Carrier Group is one of the most critical parts of your build. Don’t buy an imitation. This is the same BCG we use on our builds.
Complete Phosphate M-16 BCG
Phosphate and Nickel Boron Coating Inside and Out (Bolt, Carrier, and Gas Key)
Laser Engraved with ST Spider logo
Mil Spec Carrier
- 8620 Tool Steel
- Full Auto M-16
Mil Spec Bolt
- 158 Carpenter Steel or 9310 Depending on Supply
- Shot Peened
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)
Mil Spec Extractor
- 8620 Tool Steel
- Nickel Boron Finish
- Extractor Spring
- Black Extractor Insert
- Viton O-Ring
Mil Spec Gas Key
- 8620 Tool Steel
- Grade 8 Hardware
- Properly Staked
- Firing Pin with Hard Chrome Finish
- Cam Pin Phosphate and Nickel Boron Finish
- Retaining Pin
- Weight: 11.6oz
