Rock River Arms BT91850 LAR-BT9G | 9mm | 16″ Threaded

The Rock River Arms LAR-BT9G is a semi-automatic 9mm carbine built on an aluminum receiver with a 16″ threaded barrel and a six-position tactical stock. It accepts Glock-pattern magazines, making it a practical option for shooters who want magazine commonality with compatible pistols. For an optic under $1000 that pairs well with this platform, consider a low-power variable such as the Vortex Strike Eagle 1-6×24 or a robust red-dot like the Holosun 510C for fast target acquisition and adjustable magnification.

Typical applications include range training and pistol-caliber carbine (PCC) competition where controllable recoil and common magazine compatibility are advantages. The rifle’s configuration also suits extended casual plinking and cartridge-specific practice sessions.

Product Specifications

• The manufacturer is Rock River Arms.
• The model/part number is BT91850 / LAR-BT9G.
• The caliber is 9mm.
• The action is Semi-Auto.
• The barrel measures 16″ and is threaded for muzzle devices.
• The barrel description is Threaded.
• The muzzle device is an A2 Flash Hider.
• The receiver material is Aluminum.
• The stock description is RRA 6 Position Tactical.
• The stock finish group is Black.
• The grip is a Black Hogue Rubber Grip.
• The trigger type is Single Stage.
• The rate of twist is 1:10″.
• The weight is approximately 7.10 lbs.
• The overall length is 36″.

This LAR-BT9G blends a full-length 16″ threaded barrel with a stable aluminum receiver and an adjustable six-position stock to provide predictable handling and familiar ergonomics. Its Glock-magazine compatibility simplifies logistics for shooters who already carry compatible pistols, and the Hogue rubber grip improves control during extended sessions. The package is suited to shooters looking for a reliable, shootable 9mm carbine that balances controllability and parts commonality.