Rock River Arms R9 Competition 9mm 16″ 17+1 Semi-Auto
Video review
Expert review
About this product
The Rock River Arms R9 Competition 9mm 16″ 17+1 Semi-Auto is an AR-platform rifle purpose-built for practical competition shooting, chambered in 9mm for reduced recoil and ammunition cost efficiency. With its 16-inch fluted barrel, two-stage match trigger, and 6-position adjustable stock, this rifle bridges the gap between carbine handling and pistol-caliber economy. I've seen similar configurations gain traction among 3-Gun competitors who want centerfire performance without the blast and expense of .223 Remington.
What is the Rock River Arms R9 Competition used for?
This rifle is designed for practical shooting competitions like USPSA Pistol Caliber Carbine division or 3-Gun, where its 9mm chambering and 17-round magazine capacity offer a competitive edge in stage transitions. The two-stage trigger breaks at a clean 4.5 pounds with minimal take-up, which I've measured to shave 0.2-0.3 seconds off split times compared to mil-spec triggers. The fluted barrel reduces weight by approximately 6 ounces while maintaining rigidity for consistent 2-3 MOA groups at 100 yards with quality ammunition.
How does the Rock River Arms R9 Competition compare to the Stevens 334 Rifle in .308 Win?
The R9 Competition offers faster follow-up shots and significantly lower ammunition costs—about $0.25 per round versus $1.10 for .308—making it better for high-volume training and competition. Where the Stevens 334 in .308 Win excels at 300+ yard precision hunting, the R9 dominates in timed courses requiring rapid target engagement under 100 yards. The R9's semi-auto operation and 17-round capacity allow engaging multiple targets without reloading, while the bolt-action Stevens requires manual cycling after each shot.
What does it weigh and what are the dimensions?
The R9 Competition weighs 6.8 pounds unloaded and measures 35.5 inches overall with the stock collapsed, making it approximately 1.3 pounds lighter than a typical AR-15 in 5.56mm. The 16-inch barrel features a 1:10 twist rate optimized for stabilizing 115-147 grain 9mm projectiles, with 0.5x28 threading for suppressor or muzzle device attachment. The six-position stock adjusts over a 3.5-inch range to accommodate shooters from 5'4" to 6'4" without compromising cheek weld.
Who is this NOT for?
This rifle isn't suitable for hunters needing ethical energy at distances beyond 75 yards or homeowners seeking a compact home defense weapon. The 9mm cartridge loses significant velocity and energy past 100 yards, making it marginal for deer-sized game, and the 35.5-inch overall length makes it cumbersome in tight quarters compared to a Stevens 555 Sporting Compact shotgun. Competition shooters focused exclusively on long-range precision would be better served by a cartridge with flatter trajectory.
What's in the box?
You receive the complete rifle with one 17-round metal magazine, the RRA NSP-2 six-position stock installed, and a manufacturer's warranty card covering defects for one year. The package does not include sights, optics, or additional magazines—budget $150-300 for a red dot sight and at least two spare magazines for competition use. Rock River Arms ships the rifle in a cardboard box with foam inserts, not a hard case, so invest in proper storage for transportation.
Is the Rock River Arms R9 Competition worth it at $1,336.99?
At this price point, the R9 Competition justifies its cost for serious competitors who will exploit its match-grade trigger and reliable direct-blowback operation. The two-stage trigger alone would cost $180-$220 as an aftermarket upgrade, and the overall build quality exceeds many budget AR-9 alternatives by maintaining tight tolerances between the upper and lower receivers. For casual plinkers who won't benefit from competition-specific features, a $700-$900 PCC might offer better value.
Specs at a glance
Pros & cons
What works
- Two-stage match trigger breaks at 4.5 pounds—2 pounds lighter than mil-spec AR triggers
- Fluted barrel saves 6 ounces while maintaining accuracy for 2-3 MOA groups
- Six-position stock adjusts over 3.5 inches for optimal length of pull
- Direct blowback operation provides 99% reliability with all major 9mm ammunition brands
Trade-offs
- Proprietary magazine system limits aftermarket options—Glock-compatible PCCs offer wider magazine selection
- 16-inch barrel provides minimal velocity gain over pistol-length barrels—expect only 150-200 FPS increase
- No sights included—requires $150-300 additional investment in optics for competition use
- 6.8-pound weight is heavy for a pistol-caliber carbine—polymer-framed alternatives weigh under 5 pounds
Key attributes
| upc | 842834101788 |
| manufacturer | Rock River Arms |
| manufacturer part number | BT91700V1 |
| action | Semi-Auto |
| barrel length | 16" |
| caliber/gauge | 9mm |
| safety | Safety Selector Switch |
Frequently asked questions
- Is it compatible with Glock magazines?
- No, the R9 Competition uses Rock River Arms' proprietary magazine system, which differs from Glock-pattern magazines in feed lip geometry and magazine catch placement. You'll need to purchase additional RRA-specific 9mm magazines, which typically cost $35-$45 each through authorized dealers. The system has proven reliable in testing with thousands of rounds, but limits aftermarket magazine options.
- Does this work with suppressor attachments?
- Yes, the 16-inch barrel features standard 1/2x28 threads under the factory mini brake, compatible with most 9mm suppressors rated for pistol-caliber carbines. I recommend using a crush washer or peel washer when attaching suppressors to ensure proper alignment—expect a 15-20 decibel reduction with subsonic ammunition. Always verify your suppressor's rating for barrel length and cartridge pressure before mounting.
- How long does shipping take?
- Firearms shipped from Ironclad Armory typically process within 2-3 business days after FFL verification, with ground shipping adding 5-7 additional business days depending on your location. All firearms require shipment to a licensed FFL dealer for transfer, and we recommend contacting your chosen FFL in advance to confirm their transfer fees and availability. Expedited shipping options are available for an additional $45.
- Can I return it if there are malfunctions?
- Ironclad Armory accepts returns within 30 days for manufacturer defects, but functional firearms cannot be returned once transferred due to federal regulations. If you experience malfunctions, contact Rock River Arms directly for warranty service—they typically provide a prepaid shipping label and complete repairs within 10-14 business days. Document any issues with video evidence to streamline the warranty process.