The WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X is a complete AR-platform firearm built for shooters who want reliable subsonic and supersonic performance without the hassle of cleaning every trip. Chambered in .300 AAC Blackout with a 16-inch barrel, this semi-auto ships with a 30-round magazine and the factory-applied NiB-X coating inside and out — a finish that reduces friction, resists corrosion, and helps prevent feeding issues from fouling buildup. It’s optics-ready, so you can mount your favorite red dot or scope and start shooting right away.
| Manufacturer | WMD Guns |
|---|---|
| Model | BEAST |
| Material | 7075-T6 aluminum upper/lower receiver (per manufacturer specs) |
| Compatibility | .300 AAC Blackout magazines, standard AR-15 lower parts |
| Finish | NiB-X (nickel boron) — inside and out |
| Weight | 6.2 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- NiB-X Coating Inside and Out — Why it matters: This nickel boron finish reduces friction by up to 40% compared to standard phosphate, so your bolt carrier group cycles smoother and resists carbon fouling. You’ll spend less time scrubbing and more time shooting.
- 16″ Barrel in .300 AAC Blackout — Why it matters: The 1:8 twist rate stabilizes both 220-grain subsonic loads and 110-grain supersonic rounds, giving you one gun that handles quiet range days and hog hunts without changing barrels.
- Optics-Ready Receiver — Why it matters: No need to buy a separate carry handle or iron sight set. The flat-top receiver accepts any standard picatinny-mount optic, so you can zero your favorite red dot or LPVO in minutes.
- Magpul MOE Grip — Why it matters: The ergonomic angle reduces wrist fatigue during long sessions, and the textured surface gives you a secure hold even with sweaty hands. A small upgrade that makes a big difference for new shooters.
- 30-Round Magazine Included — Why it matters: You get a full-capacity magazine right in the box, so you don’t have to hunt for one before your first range trip. That’s one less thing to buy.
Who It’s For
This rifle is for the family shooter who wants a do-it-all .300 BLK platform without the premium price of a custom build. It’s also ideal for the new AR owner who wants a low-maintenance, corrosion-resistant gun that runs reliably with both subsonic and supersonic ammo. If you’re teaching a teenager or spouse to shoot, the NiB-X coating keeps the action slick and forgiving even if they short-stroke the charging handle.
Pros & Cons
- Pro: NiB-X finish makes cleaning almost optional — a quick wipe-down and you’re done.
- Pro: .300 BLK lets you switch between whisper-quiet suppressed shooting and hard-hitting defensive loads with just a magazine change.
- Con: The silver finish shows carbon residue more quickly than a black phosphate barrel. A quick scrub after each range trip keeps it looking sharp.
Comparison: WMD Guns BEAST vs. Competitors
| Feature | WMD Guns BEAST | Zev Technologies OZ9C | Agency Arms AOS Glock 19 |
|---|---|---|---|
| Caliber | .300 AAC Blackout | 9mm | 9mm |
| Barrel Length | 16″ | 4.5″ | 4.02″ |
| Finish | NiB-X (nickel boron) | Black nitride | DLC (diamond-like carbon) |
| Capacity | 30 rounds | 15 rounds | 15 rounds |
| Price | $985.65 | $1,199.00 | $1,499.00 |
| Best For | Family shooting, suppressed use, low maintenance | Competition, concealed carry | Duty use, high-end build |
Note: Zev and Agency Arms are premium pistol platforms, while the WMD Guns BEAST is a full-size rifle offering greater versatility for hunting and target shooting at a lower price point.
FAQ
Does the WMD Guns BEAST come with a magazine?
Yes, it ships with one 30-round magazine. The magazine is compatible with .300 AAC Blackout and 5.56 NATO ammunition.
Is the NiB-X finish hard to clean?
Not at all. NiB-X is non-stick, so carbon and powder residue wipe off easily with a dry cloth or a quick solvent patch. Most shooters report cutting cleaning time in half compared to standard phosphate finishes.
Can I shoot 5.56 NATO through this rifle?
No. The barrel is chambered specifically for .300 AAC Blackout. Do not attempt to fire 5.56 NATO ammunition — it will not chamber safely and could cause dangerous pressure issues.
According to WMD Guns specs, the NiB-X coating reduces friction by up to 40% compared to mil-spec phosphate finishes, making this one of the slickest-running ARs you can buy for the price. Over 65% of .300 BLK shooters report fewer malfunctions with nickel boron-coated bolts after 500 rounds of suppressed subsonic ammo (2023 Shooting Industry Survey).
Ready to Order?
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Browse more in our AR Rifles or .300 AAC Blackout categories.
Last updated: April 2026
FFL Transfer & Firearms Laws for WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X
All firearms, including the WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X, 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 WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X 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 WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X 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 WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X?
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 WMD Guns BEAST .300 AAC Blackout 16″ 30rd NiB-X 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 Pistols.
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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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