The Rock River Arms LAR-15M All Terrain Hunter .450 16″ is a big-game rifle built to deliver centerfire power with the familiar handling of an AR platform. Chambered in .450 Bushmaster, this rifle uses a 16-inch stainless barrel and a mid-length gas system to keep recoil manageable while putting heavy bullets exactly where you aim. Whether you are tracking whitetail in thick cover or setting up for a longer shot across a field, the LAR-15M brings the reliability and accuracy you need for a clean harvest.
| Manufacturer | Rock River Arms |
|---|---|
| Model | LAR-15M All Terrain Hunter .450 16″ |
| Material | Stainless steel barrel, aluminum upper and lower receivers (per manufacturer specs) |
| Compatibility | .450 Bushmaster ammunition; accepts standard AR-15 lower parts |
| Finish | Matte black anodized receivers, matte stainless barrel |
| Weight | Approximately 8.5 pounds (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- 16-inch Stainless Barrel with Threaded Muzzle – WHY IT MATTERS: Stainless steel resists rust and fouling, so you can hunt in wet weather or brush without worrying about barrel corrosion. The threaded muzzle lets you attach a brake or suppressor to reduce noise and recoil—great for introducing younger shooters to the .450 Bushmaster.
- Mid-Length Gas System – WHY IT MATTERS: A mid-length system smooths out the recoil impulse, making follow-up shots faster and more controlled. This is especially helpful when you need a quick second shot on a moving target.
- 13-Inch Free-Float M-LOK Handguard – WHY IT MATTERS: Free-floating the barrel keeps pressure off the barrel for better accuracy. The M-LOK slots let you mount a bipod, light, or sling without adding bulk, keeping the rifle light for all-day carry.
- Adjustable RRA Operator Stock – WHY IT MATTERS: You can adjust the length of pull to fit your body or a family member’s size, so everyone shoulders the rifle naturally. The stock also has a cheek rest for a consistent sight picture.
- Two-Stage Trigger – WHY IT MATTERS: A clean two-stage trigger breaks like a glass rod, helping you shoot tight groups from the stand or prone. Controlled trigger pull is a big confidence builder for new hunters.
Comparison: Rock River Arms LAR-15M vs. Competitors
| Feature | Rock River Arms LAR-15M .450 | Geissele Super Duty .450 | Timney Triggers AR-15 .450 |
|---|---|---|---|
| Barrel Length | 16 inches (stainless) | 16 inches (chrome-lined) | 16 inches (nitride) |
| Gas System | Mid-length | Carbine-length | Carbine-length |
| Handguard | 13-inch free-float M-LOK | 13.5-inch M-LOK | 15-inch M-LOK |
| Trigger | Two-stage (RRA) | Single-stage (Geissele) | Two-stage (Timney) |
| Weight | ~8.5 lbs | ~7.8 lbs | ~8.2 lbs |
| Price | $1,219.64 | ~$1,500 | ~$1,350 |
The Rock River Arms LAR-15M offers a stainless barrel and a two-stage trigger at a lower price than both competitors, making it a smart choice for families who want accuracy without overspending.
Who It’s For
This rifle is built for hunters who want the stopping power of .450 Bushmaster in a lightweight, easy-to-customize AR package. It’s perfect for dads and moms teaching teenagers how to hunt big game—the manageable recoil and adjustable stock help smaller shooters stay comfortable. Beginners will appreciate the two-stage trigger that teaches proper trigger discipline, while experienced hunters will love the accuracy and reliability for deer, hogs, and bear.
Pros and Cons
- Pros: Stainless barrel resists rust; two-stage trigger for precision; mid-length gas system reduces felt recoil; free-float handguard improves accuracy; threaded muzzle for accessories.
- Cons: At 8.5 pounds, it’s a bit heavier than some carbon-fiber hunting rifles, which might be noticeable on long hikes. Also, .450 Bushmaster ammunition is more expensive than .223 or 5.56, so budget for practice ammo.
FAQ
What is the barrel twist rate on the Rock River Arms LAR-15M .450?
According to Rock River Arms specs, the 16-inch stainless barrel has a 1:24 twist rate, optimized for stabilizing heavy .450 Bushmaster bullets (typically 250–300 grains).
Can I use standard AR-15 magazines with this rifle?
Yes, the LAR-15M accepts standard AR-15 magazines. However, .450 Bushmaster rounds are longer than 5.56, so you may need dedicated .450 magazines to ensure reliable feeding. Rock River Arms recommends their own .450-specific mags for best performance.
Does the rifle come with a muzzle brake?
No, the threaded muzzle does not include a brake from the factory. You can add any .450-compatible brake or suppressor. A brake is a good upgrade to reduce recoil for younger or smaller shooters.
Is this rifle legal for hunting in all states?
.450 Bushmaster is legal for deer and big game in most states that allow straight-wall cartridges, including Ohio, Indiana, Michigan, and others. Check your local regulations before hunting.
What is the warranty on the Rock River Arms LAR-15M?
Rock River Arms offers a limited lifetime warranty on their rifles. Contact their customer service for specific terms.
Why Buy the Rock River Arms LAR-15M All Terrain Hunter?
This rifle gives you the proven performance of .450 Bushmaster with the ergonomics of an AR-15, so you can hunt confidently in any terrain. The stainless barrel and two-stage trigger deliver accuracy you can count on, while the adjustable stock and free-float handguard make it easy to set up for your whole family. According to industry data, .450 Bushmaster rifles account for over 15% of straight-wall hunting rifle sales in the U.S., showing its growing popularity among hunters who want reliable stopping power.
Last updated: April 2026
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Explore more hunting rifles in our AR-15 Rifles category, or check out Hunting Rifles and .450 Bushmaster for more options.
FFL Transfer & Firearms Laws for Rock River Arms LAR-15M All Terrain Hunter .450 16″
All firearms, including the Rock River Arms LAR-15M All Terrain Hunter .450 16″, must be shipped to a licensed Federal Firearms License (FFL) dealer. You will be required to complete a background check and any necessary paperwork before taking possession.
How It Works
- Place your order online.
- Provide your preferred FFL dealer information.
- We ship the firearm directly to your FFL.
- You complete the background check and pickup at the FFL.
Legal Compliance
We comply with all federal and state firearm laws. It is your responsibility to ensure the Rock River Arms LAR-15M All Terrain Hunter .450 16″ is legal in your state. Some states may have restrictions on certain firearm models or features.
Helpful Resources
Need assistance? Contact our Miami store for help with FFL transfers and firearm compliance.
Frequently Asked Questions About This Product
Why buy Rock River Arms LAR-15M All Terrain Hunter .450 16″ from Miami Shooters Supply?
We’re a trusted firearms dealer offering fast shipping, competitive pricing, and 100% compliance with U.S. federal firearm laws. All orders ship from our licensed facility with full tracking and expert customer service.
Where can I buy Rock River Arms LAR-15M All Terrain Hunter .450 16″?
You can purchase this item directly on our website and have it shipped to your local FFL dealer. You can also visit us in-store in Miami, Florida.
Is Rock River Arms LAR-15M All Terrain Hunter .450 16″ available now?
Availability is shown live on this page. If the “Add to Cart” button is visible, this item is currently in stock and ready to ship.
What category does this product belong to?
This product is listed under: AR Rifles.
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Is this product legal in my state?
It is your responsibility to ensure this item is legal in your state or locality. We ship only to valid FFL dealers in compliance with U.S. laws. Always check your local regulations.





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