The Rock River Arms R9 Competition 9mm rifle is a pistol-caliber AR built for fast, low-recoil competition shooting (brand part no. BT91700V1). Rock River machines the LAR-BT9G lower from billet aluminum with a Glock 17 compatible flared magwell and an integral Winter trigger guard. The 16-inch fluted stainless steel barrel is cryogenically treated and finished with a 9mm mini brake on a 1/2×36 thread. A two-stage Ultra Match trigger, a 15-inch free-float M-LOK handguard and a 6-position CAR stock complete the package. For steel, 3-gun and practical rifle courses, this Rock River Arms carbine puts a lot of features in one rifle.

Key Specifications

• The chambering is 9x19mm, an economical caliber with mild recoil for fast follow-up shots.
• The barrel is a 16-inch fluted stainless steel barrel, cryogenically treated.
• The twist rate is 1:10, a good match for common 9mm bullet weights.
• The muzzle device is a 9mm mini brake on a 1/2×36 thread, helping to tame recoil and keep the sights on target.
• The lower is a billet aluminum LAR-BT9G with a Glock 17 compatible flared magwell and an integral Winter trigger guard.
• The upper is extruded aluminum A4 with a port door and no forward assist.
• The trigger is the RRA Two-Stage Ultra Match, designed for a clean, repeatable break.
• The handguard is a 15-inch lightweight free-float rail that is M-LOK compatible for accessories.
• The stock is a 6-position NSP-2 CAR stock, adjustable to fit different shooters and positions.
• The pistol grip is a Hogue rubber grip, and the rifle ships with one Glock-compatible magazine.

Frequently Asked Questions

What magazines does the R9 Competition use? It uses Glock-pattern 9mm magazines through its Glock 17 compatible magwell, and one Glock-compatible magazine is included.

What muzzle device is installed? Rock River fits a 9mm mini brake on a 1/2×36 thread.

How much does it weigh? Rock River lists 6.8 pounds and a length of 33 inches with the stock extended.

Buy the Rock River Arms R9 Competition 9mm Rifle, 16-Inch Fluted Barrel, Mini Brake, Glock Magwell

The R9 Competition is a 9mm carbine with competition-level touches already installed. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more AR rifles while you are here.