Aero Precision AR9 9mm Bolt Carrier Group – Black Nitride

The Aero Precision AR9 9mm Bolt Carrier Group is purpose-built for 9mm AR pistol-caliber carbine builds. Engineered specifically for the AR-9 platform, this BCG uses a blowback operating system that eliminates the need for a buffer weight, making it compatible with standard carbine buffer systems. The ramped bolt face and dedicated 9mm geometry ensure reliable feeding and extraction with both Glock and Colt-pattern magazines, depending on your lower receiver configuration.

Manufactured from 8620 steel with a black nitride finish, this BCG provides excellent corrosion resistance and reduced friction for smoother cycling. The nitride treatment penetrates the steel surface rather than coating it, delivering long-term durability even under high round counts. As a drop-in component for AR-9 uppers, installation requires no gunsmithing—simply insert into your upper receiver and install your charging handle. Designed and manufactured by Aero Precision to their MIL-SPEC standards.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-9 / 9mm AR pistol-caliber carbines
• Material: 8620 Steel
• Finish: Black Nitride
• Installation: Drop-In
• Includes: Bolt Carrier Group assembly