CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd
$1,722.11
The CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd is a factory-built AR-platform rifle with a 16.1-inch threaded barrel, ambidextrous controls, and a Cerakote Midnight Bronze finish, ready for suppressed shooting, hunting, and home defense right out of the box.
The CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd is a factory-built AR-platform rifle from CMMG, chambered in .300 AAC Blackout and ready for suppressed shooting or hunting right out of the box. With a 16.1-inch medium-taper barrel, ambidextrous controls, and a Cerakote Midnight Bronze finish, this rifle gives you the reliability of a mil-spec AR-15 with modern upgrades for home defense, target shooting, and backcountry use.
| Manufacturer | CMMG |
|---|---|
| Model | Resolute MK4 |
| Material | 7075-T6 aluminum upper and lower receiver, steel barrel |
| Compatibility | Standard M4/AR-15 lower parts, magazines, and accessories |
| Finish | Cerakote Midnight Bronze with bi-tone metal accents |
| Weight | 6.9 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- 16.1″ Medium-Taper Threaded Barrel — This barrel profile balances weight and heat dissipation, and the 5/8×24 threading makes it easy to attach a suppressor or muzzle brake for quieter shooting.
- Ambidextrous Controls — The MK4 lower includes an ambidextrous safety selector and bolt release, so left-handed shooters can run the gun without changing their grip.
- Cerakote Midnight Bronze Finish — This durable coating resists corrosion and scratches, plus the bi-tone metal accents give the rifle a clean, custom look right off the shelf.
- Magpul 30rd PMAG Included — You get a reliable, drop-free magazine that feeds .300 Blackout rounds without hiccups, saving you an extra purchase.
- M4/AR-15 Parts Compatibility — Every component uses standard AR-15 specs, so you can upgrade triggers, stocks, and grips with parts from brands like Geissele or Timney without gunsmithing.
Who It’s For
This rifle is built for shooters who want a .300 Blackout platform that runs suppressed right away, without needing a short-barrel rifle tax stamp. It’s ideal for families learning to shoot together because the manageable recoil and subsonic ammunition make it quiet and controllable. It also fits hunters who need a compact, reliable rifle for deer or hogs in brushy terrain.
Pros and Cons
- Pros: Factory-built reliability, ambidextrous controls for all shooters, threaded barrel for suppressors, Cerakote finish resists weather, uses standard AR-15 parts for easy upgrades.
- Cons: The 16.1-inch barrel is longer than dedicated suppressed setups (like a 10.5″ SBR), so it’s not the most compact option for backpack carry. Also, .300 Blackout ammunition costs more than 5.56 NATO for practice.
Comparison
| Feature | CMMG Resolute MK4 .300 BLK | Geissele Super Duty .300 BLK | Zev Technologies AR-15 .300 BLK |
|---|---|---|---|
| Barrel Length | 16.1″ | 16″ | 16″ |
| Finish | Cerakote Midnight Bronze | Black anodized | Black anodized |
| Ambidextrous Controls | Yes (safety + bolt release) | Yes (safety only) | No (standard) |
| Included Magazine | Magpul PMAG 30rd | Magpul PMAG 30rd | None |
| Price (approx) | $1,537 | $2,200+ | $1,900+ |
FAQ
Can I use this rifle with a suppressor?
Yes. The 16.1-inch barrel is threaded 5/8×24, which is the standard thread pitch for .30-caliber suppressors. You can attach most rifle suppressors directly without an adapter.
What ammunition does the CMMG Resolute MK4 use?
It chambers .300 AAC Blackout, both supersonic and subsonic loads. The 1:8 twist rate stabilizes bullets from 110 to 220 grains, so you can shoot hunting rounds or quiet subsonic ammo.
Is this rifle California-compliant?
This model ships with a standard 30-round magazine and features that may not meet California’s assault weapon laws. Contact your local FFL to check compliance before ordering.
Can I upgrade the trigger later?
Absolutely. The lower receiver uses standard AR-15 trigger specs, so you can swap in a drop-in trigger from Timney, Geissele, or any other brand without modifying the rifle.
How does the 16.1″ barrel compare to shorter barrels for home defense?
A 16.1″ barrel gives you more velocity and better accuracy at longer ranges than a 10.5″ or 12.5″ barrel, but it is longer for maneuvering indoors. For home defense, you can pair it with a shorter stock or a suppressor to reduce overall length.
Trust Block
- ✅ Nationwide delivery to all 50 states (restrictions apply per local laws)
- ✅ Ships within 1–2 business days from our warehouse
- ✅ 30-day return policy on new, unfired firearms
- ✅ Secure checkout with encrypted payment processing
Explore more in our AR Rifles collection, check out AR-15 Parts & Upgrades, or browse Suppressor Accessories to complete your setup.
Last updated: April 2026
FFL Transfer & Firearms Laws for CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd
All firearms, including the CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd, 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 CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd 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 CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd 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 CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd?
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 CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd 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.
What tags or features does this product have?
Key features and tags for this product include: .
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.
Be the first to review “CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd”
FFL Transfer & Firearms Laws
All firearms, including the CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd, must be shipped to a licensed Federal Firearms License (FFL) dealer. A background check and any required local paperwork must be completed before you can take possession.
How It Works
- Place your order online.
- Send us your preferred local FFL dealer info.
- We ship the firearm to your FFL after verification.
- Complete background check and pick up from your dealer.
Legal Compliance
We comply with all U.S. firearm laws. It is your responsibility to ensure the CMMG Resolute MK4 300 AAC Blackout 16.1″ 30rd is legal in your state. Some states (e.g. CA, NY, NJ) have restrictions on magazine size or certain features.
Helpful Links
Need help? Contact our team — we’ll guide you through selecting a compliant firearm and the FFL transfer process.
Reviews
There are no reviews yet.