Features and Specifications:
- Complete Nickel Boron M-16 BCG
- 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
- Holes for Reduced Weight (-1oz)
- Mil Spec Bolt
- 158 Carpenter Steel
- 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 Nickel Boron Finish
- Retaining Pin
- Weight: 10.5oz
