KAK Industry AR9 BCG 9mm Enhanced Nitride Black

The KAK Industry AR9 BCG is a 9mm bolt carrier group designed for AR-9 pistol-caliber carbine builds. This enhanced BCG handles the blowback operation of 9mm chambered AR-style firearms, eliminating the need for a buffer system while maintaining reliable cycling with common 9mm ammunition. It's a direct replacement for standard AR-9 bolt carrier groups and works with Glock-compatible or Colt-style 9mm magazine lowers depending on your ejector configuration.

Constructed from heat-treated steel with a black nitride finish, this BCG offers wear resistance and corrosion protection superior to phosphate coatings. The nitride treatment penetrates the metal surface rather than sitting on top, reducing friction and simplifying cleaning. Installation is drop-in for AR-9 uppers—no fitting or modification required. Designed for shooters building or upgrading 9mm AR pistols and carbines.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-9 pistol-caliber carbines (9mm)
• Material: Heat-treated steel
• Finish: Black nitride
• Installation: Drop-in
• Includes: Complete bolt carrier group