Battle Arms Development 9mm AR-15 Bolt Carrier Group – Black Nitride

The Battle Arms Development 9mm AR-15 Bolt Carrier Group is engineered for shooters building or maintaining a 9mm AR-15 carbine or pistol. Unlike standard AR-15 BCGs, this unit uses a radial delayed blowback system designed specifically for pistol-caliber carbines, eliminating the need for a buffer weight system while providing reliable cycling with 9mm Luger ammunition. This BCG replaces standard .223/5.56 bolt carrier groups and allows for a dedicated 9mm upper or complete build.

Constructed from 8620 steel with a black nitride finish for corrosion resistance and reduced friction. The radial delayed blowback design uses symmetrical rollers to delay unlocking until chamber pressure drops to safe levels, resulting in smoother recoil and improved reliability compared to straight blowback systems. Installation is drop-in for compatible 9mm AR-15 uppers. No additional weights or specialized buffers required. This is a complete bolt carrier group ready to install.

• Part Type: Bolt Carrier Group
• Compatible Firearms: 9mm AR-15 Upper Receivers
• Caliber: 9mm Luger
• Material: 8620 Steel
• Finish: Black Nitride
• Operating System: Radial Delayed Blowback
• Installation: Drop-In
• Includes: Complete Bolt Carrier Group