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Complete Nickel Boron Plated 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
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: 11.6oz
