APOC Armory Black Nitride Bolt Carrier Group 5.56/.223

APOC Armory Black Nitride Bolt Carrier Group 5.56/.223

APOC ARMORY

Regular price $79.95 Sale

The QPQ (Quench Polish Quench) process is an advanced Black Nitriding process, which augments the standard Nu-Tride process. Enhancing corrosion resistance involves a secondary polishing operation, followed by re-oxidation to produce a lustrous black finish as well as case hardening the steel.  Tests show significant reduction in wear to components subjected to black nitride over standard parkerizing methods. 

Features:

  • 5.56/.223/.300 Black Out
  • Full Auto Capable
  • 9310 MPI and HPT Tested bBolt
  • 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

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