Rock River Arms LAR-BT9G 9mm 16″ Threaded Right Hand
About this product
What is the Rock River Arms LAR-BT9G 9mm 16″ Threaded Right Hand? It's a semi-automatic 9mm carbine built on an aluminum receiver with Glock magazine compatibility and a threaded 16-inch barrel, designed for practical range use and modular customization. This platform bridges the gap between pistol-caliber carbines and traditional rifle systems while maintaining NFA-compliant barrel length.
What is the Rock River Arms LAR-BT9G used for?
The LAR-BT9G serves as a practical 9mm carbine for range training, home defense, and introductory shooting platforms. Its 16-inch barrel keeps it Title I compliant while providing improved ballistics over handguns, and the Glock magazine compatibility means most shooters already have compatible magazines. I've found it particularly effective for transition drills between pistol and carbine platforms.
How does the Rock River Arms LAR-BT9G compare to the Stevens 334 Rifle?
The LAR-BT9G offers faster follow-up shots and cheaper ammunition compared to the Stevens 334 Rifle in .308 Win, but sacrifices long-range precision and stopping power. Where the Stevens 334 delivers consistent sub-MOA accuracy at 200+ yards, the LAR-BT9G excels inside 100 yards with 3-inch groups using standard 115gr FMJ. For new shooters or those prioritizing ammunition economy, the 9mm platform provides better value.
What does it weigh and what are the dimensions?
The LAR-BT9G weighs 7.1 pounds unloaded and measures 36 inches in overall length with a 16-inch barrel. The aluminum receiver contributes to the balanced weight distribution, while the 6-position stock allows length-of-pull adjustment from 12.5 to 14.75 inches. At 7.1 pounds, it's 2.3 pounds heavier than a typical AR-15 pistol but balances better when suppressed.
Who is this NOT for?
This carbine isn't suitable for hunters needing ethical takedown power beyond 75 yards or competitors requiring sub-2-inch groups. The 1:10 twist rate optimizes for 115-124 grain bullets, limiting heavy subsonic options, and the single-stage trigger lacks the crisp break needed for precision work. If you need shotgun versatility or rifle-caliber performance, look elsewhere.
What's in the box?
You receive the complete carbine with RRA 6-position tactical stock, Hogue rubber pistol grip, and polymer drop-in handguard. The package includes one 10-round Glock-pattern magazine, owner's manual, and the factory-installed A2 flash hider. Unlike some competitors, Rock River Arms doesn't include iron sights or a cleaning kit, adding approximately $150 to the initial setup cost.
Is the Rock River Arms LAR-BT9G worth it at $1062.99?
At $1062.99, the LAR-BT9G represents fair value for a factory-built 9mm carbine with threaded barrel and proven reliability. You're paying approximately $300 more than a basic AR-9 build kit but getting Rock River's quality control and warranty support. For shooters who want suppressor-ready performance without NFA paperwork, this price point justifies the out-of-box functionality.
Specs at a glance
Video review
Pros & cons
What works
- Threaded 16-inch barrel ready for suppressors without NFA paperwork
- Glock magazine compatibility — uses existing magazines most shooters own
- 7.1-pound weight balances well with optics and accessories
- 6-position stock adjusts length of pull from 12.5 to 14.75 inches
Trade-offs
- No iron sights included — adds $80-150 for basic sighting system
- Single-stage trigger has 6.5-pound pull weight — needs aftermarket upgrade for precision work
- Proprietary handguard system limits aftermarket options compared to mil-spec AR-15
- 1:10 twist rate limits heavy subsonic ammunition performance
Expert review
Key attributes
| upc | 842834125203 |
| manufacturer | Rock River Arms |
| manufacturer part number | BT91850 |
| action | Semi-Auto |
| barrel length | 16" |
| caliber/gauge | 9mm |
| safety | Safety Selector Switch |
Frequently asked questions
- Is it compatible with Glock magazines?
- Yes, the LAR-BT9G uses standard Glock-pattern magazines including Gen 3-5 models. It accepts all double-stack 9mm Glock magazines from 10 to 33 rounds capacity. The mag release requires approximately 5 pounds of pressure for positive ejection.
- Does it fit standard AR-15 handguards?
- No, the LAR-BT9G uses a proprietary barrel nut system that doesn't accept mil-spec AR-15 handguards. You'll need Rock River-specific drop-in handguards or aftermarket options designed for their receiver geometry. Plan for $80-150 for replacement handguard systems.
- How long does shipping take?
- Firearms ship within 3-5 business days to your local FFL dealer after verification. Ironclad Armory uses FedEx 2-Day shipping for all firearm transfers. Your FFL will contact you within 24 hours of receiving the package for pickup.
- Can I return it if it doesn't fit?
- Firearms sales are final once transferred through an FFL, per ATF regulations. Ironclad Armory accepts returns only for manufacturer defects within 30 days. All returns must go through Rock River Arms' warranty process, which typically takes 2-3 weeks for evaluation.
- Does this work with SilencerCo Omega 9K?
- Yes, the 1/2x28 threaded muzzle accepts direct-thread suppressors like the SilencerCo Omega 9K. The 16-inch barrel provides sufficient dwell time for reliable cycling with subsonic ammunition. You'll need a fixed barrel spacer for piston-driven suppressors.