Toolcraft Black Nitride .308 Bolt Carrier Group

Toolcraft Black Nitride .308 Bolt Carrier Group | BCG

Toolcraft uses the QPQ (Quench Polish Quench) process to augment the standard Nu-Tride process with the advanced Black Nitriding process. It enhances corrosion resistance due to the expanded secondary polishing procedure, followed by re-oxidation to produce a lustrous black finish as well as case hardening the steel. 

Features:

• .308 Winchester 7.62 By 51 NATO
• Full Auto Capable
• 9310 MPI and HPT Tested Bolt
• Case Hardened 8620 Carrier
• 4130 Gas Key
• Grade 8 Hardware With Proper Staking
• Gas Key Sealed With Permatex No.3
• 8740 Hard Chrome Firing Pin
• Black  Nitride Treated For Reduced Friction And Increased Longevity 
• Proudly Made In The U.S.A
• Unconditional Lifetime Warranty