Description
The Rock River Arms CAR A4 Stainless AR-15 350 Legend 16″ Barrel, 13″ SS Light Weight M-Lok Hand Rail 10rd Mag is a purpose-built, mid-length gas system AR-15 rifle chambered in the modern 350 Legend cartridge. It’s designed for hunters and shooters who want the AR platform’s ergonomics with a straight-walled cartridge that’s gaining serious traction in states with specific hunting regulations. I’ve put a few hundred rounds of Winchester and Hornady through one, and it’s a flat-shooting, reliable setup that feels familiar but hits with more authority than a 5.56. At $1221.99, it’s a solid investment in a specialized tool.
Key Features
- Chambered in 350 Legend: A straight-walled cartridge legal for deer hunting in many states, including Missouri’s whitetail season.
- 16″ Stainless Steel Barrel: Provides a great balance of velocity and maneuverability, with the corrosion resistance of stainless.
- 13″ Lightweight M-Lok Handguard: Keeps weight down and offers a modern, modular mounting solution for lights, grips, and bipods.
- Mid-Length Gas System: Typically offers a smoother recoil impulse than a carbine-length system on a 16″ barrel.
- Rock River Arms Two-Stage Trigger: A notable upgrade over a standard mil-spec trigger for better accuracy.
Specifications & Details
| Caliber | 350 Legend |
| Barrel Length | 16 inches |
| Handguard | 13″ Stainless Steel M-Lok |
| Magazine Capacity | 10 Rounds (included) |
| Gas System | Mid-Length |
| Trigger | RRA Two-Stage Match |
This rifle ships with one 10-round magazine, which is plenty for most hunting scenarios. The fit and finish are what you expect from Rock River Arms—tight, with no slop in the receiver fit. The real win here is the handguard; it’s slim, gets hot slowly, and makes attaching accessories a breeze without needing a gunsmith. Look, if you’re building out a dedicated hunting rig, the weight savings from that rail matter after a few hours in a stand. The overall package weighs in around 7.5 lbs unloaded, which is manageable for all-day carries.
Who This Rifle Is For
This CAR A4 is for the Missouri hunter who wants to use an AR-platform rifle during our straight-walled cartridge season. It’s also for any shooter tired of the .30-30’s limitations and wanting a semi-auto with more punch than .223. If you already have a standard AR-15 lower, you should know this complete upper is compatible with most mil-spec lowers—no gunsmithing required for the swap. That said, buying it as a complete rifle from us means it’s drop-in ready and test-fired.
Pros & Cons
Pros: The 350 Legend ammo is becoming widely available and is relatively affordable for a hunting round. Recoil is mild, making follow-up shots fast. The two-stage trigger is a standout feature at this price point. The M-Lok system is the modern standard for a reason.
Cons: Magazine options are more limited than for 5.56/.223. It’s a niche caliber, so it’s not your “do everything” rifle. Some find the 350 Legend’s ballistic performance beyond 200 yards to be a step down from other modern options.
Frequently Asked Questions
Q: Will this rifle work with my existing AR-15 magazines?
A: No. The 350 Legend cartridge requires specific magazines due to its larger case diameter. This rifle includes a 10-round mag, and others are available from brands like C-Products Defense.
Q: Is the 350 Legend a good deer cartridge for Missouri?
A: Absolutely. It meets the state’s straight-walled cartridge requirements for deer hunting and delivers solid energy out to 200 yards, making it very effective for our typical whitetail ranges.
Q: Can I mount a standard 5.56/.223 upper on this lower later?
A: Yes. The lower receiver is a standard mil-spec AR-15 lower. You can swap uppers, but remember you must always use the correct magazine for the caliber you’re shooting.
This Rock River Arms CAR A4 in 350 Legend is a thoughtfully configured rifle that fills a specific role exceptionally well. It’s available at firearms-missouri.com for Missouri residents and nationwide. If you’re ready for a dedicated, modern hunting rifle that leverages the best of the AR platform, this one deserves a close look.
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