BLACK NITRIDE (Melonite) BCG rated full auto.
Black Nitride is a process commonly referred to as SBN (Salt bath nitride) and QPQ (quench polish quench). These are a form of nitrocarburizing or a Thermo Chemical treatment that improves wear resistance and corrosion resistance of ferrous metals with little or no dimensional change which causes the hardening of steel. The chemical bath results in a deep dark black with a harder, more durable finish. 5.56 / .223 / 300BLK More information or to order online please follow the link below.
  • CARRIER SPECIFICATIONS
  • Material: Domestic Aircraft Quality 8620 Steel
  • Gas Key: 4130 Steel: Grade 8 Gas Key Screws (properly staked)
  • BOLT SPECIFICATIONS
  • Bolt Material: 9310 or C158
  • Extractor Material: 4140 Steel
  • Mil-Spec O-Ring
  • Mil-Spec Gas Rings (3)
  • Cam Pin Material: 4140 Steel
  • Firing Pin Material: Hard Chrome/Ground 8740
  • Other: MPI Tested, Shot Peened
  • Lifetime warranty from Toolcraft, the leader in BCG manufacturing.