CMMG Resolute Mk3 .308 Win 16.1in 20rd
$2,149.52
The CMMG Resolute Mk3 .308 Win 16.1in 20rd is a lightweight, carbine-length AR-10 built on a DPMS High-Pattern LR308 foundation for easy parts compatibility. It ships with a RipStock and M-LOK handguard, giving you a reliable .308 for range work or field use without the proprietary headaches.
The CMMG Resolute Mk3 .308 Win 16.1in 20rd is a carbine-length AR-10 built for guys who need a .308 that runs hard and doesn’t quit. It’s a no-nonsense rifle that drops the weight without dropping the ball—using a Gen 1 DPMS High-Pattern LR308 foundation for parts you can find anywhere. Chambered in .308 Win / 7.62 NATO, this one ships with CMMG’s RipStock and an updated EML 15 handguard that shaves off ounces while keeping M-LOK slots tight. If you’re a rancher, a utility shooter, or just a guy who needs a .308 that works from the truck to the range, this is it.
| Manufacturer | CMMG |
|---|---|
| Model | Resolute Mk3 |
| Material | 7075-T6 aluminum upper and lower receiver, steel barrel |
| Compatibility | DPMS High-Pattern LR308 components, standard AR-15 stock and grip |
| Finish | Hardcoat anodized black (per manufacturer specs) |
| Weight | 8.4 lbs (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- RipStock — CMMG’s own stock that lets you adjust length of pull without tools. Why it matters: you can dial it in fast for layered clothing or a heavy coat, no fumbling.
- EML 15 Handguard — M-LOK attachment points on a slim, free-floating rail. Why it matters: less weight on the front means less fatigue when you’re carrying it all day, and you can mount a bipod or light without extra bulk.
- 16.1-inch Chrome-Moly Barrel — 1:10 twist, threaded 5/8×24. Why it matters: you get .308 Win ballistics out of a carbine-length barrel that’s accurate enough for precision work, and you can add a brake or suppressor easy.
- DPMS High-Pattern LR308 Compatibility — uses standard AR-10 parts like triggers, grips, and stocks. Why it matters: you’re not stuck with proprietary junk—swap parts from any DPMS High gun.
- 20-Round Magazine — included Magpul PMAG 20 LR/SR Gen M3. Why it matters: you get reliable feeding from a proven mag that doesn’t bind up in dirt or cold.
Who It’s For
This rifle is for the informed shooter who wants a .308 that runs on common parts and doesn’t need a gunsmith to fix. It’s for ranchers who need to reach out on coyotes or deer, for utility guys who want one rifle that does range work and field work. If you’ve ever been stuck with a boutique AR-10 that needs special everything, you’ll appreciate this one.
Pros and Cons
- Pros: Lightweight for a .308 at 8.4 lbs; uses standard DPMS High parts; RipStock is a solid upgrade; M-LOK handguard is slim and strong; accurate out of the box for a carbine.
- Cons: The Gen 1 DPMS High pattern means some aftermarket rails and uppers might not fit flush without shimming—check compatibility before swapping handguards.
Comparison
| Feature | CMMG Resolute Mk3 .308 | Geissele Super Duty .308 | Zev Technologies Megalith .308 |
|---|---|---|---|
| Price | $1,919.21 | $2,499 | $2,299 |
| Weight | 8.4 lbs | 9.2 lbs | 8.9 lbs |
| Barrel Length | 16.1 in | 16 in | 16 in |
| Handguard | EML 15 M-LOK | Geissele MK16 M-LOK | Zev M-LOK |
| Parts Compatibility | DPMS High (standard) | Proprietary (Geissele) | Proprietary (Zev) |
| Stock | CMMG RipStock | Geissele Super 42 | Magpul PRS Lite |
The CMMG comes in lighter and cheaper than both, and uses standard parts. The Geissele and Zev are fine rifles, but you’re paying for brand and proprietary stuff that limits your options. If you want a .308 that you can fix with off-the-shelf parts, the Resolute wins.
FAQ
What magazines does the CMMG Resolute Mk3 .308 use?
It uses standard DPMS High-pattern .308 magazines, like Magpul PMAG 20 LR/SR Gen M3. Any LR308/SR25 mag will work, including metal Lancer and Brownells. Stick with 20-rounders for best reliability.
Is the barrel threaded for a suppressor?
Yes. The 16.1-inch barrel is threaded 5/8×24, which is standard for .308 Win. You can mount most .30-caliber suppressors or brakes directly. CMMG specs say the barrel is chrome-moly steel, 1:10 twist.
Can I swap the trigger on this rifle?
Yes. It uses a standard AR-10 trigger group—DPMS High pattern. You can drop in any drop-in trigger like a Timney or Geissele without modification. Just make sure it’s for .308/AR-10, not AR-15.
What’s the accuracy like at 100 yards?
Expect sub-2 MOA with quality factory ammo like Federal Gold Medal or Hornady ELD. Some shooters report 1.5 MOA with match loads. It’s a carbine, not a bench gun, but it’ll hold its own on steel or deer.
Trust Block
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Last updated: April 2026
FFL Transfer & Firearms Laws for CMMG Resolute Mk3 .308 Win 16.1in 20rd
All firearms, including the CMMG Resolute Mk3 .308 Win 16.1in 20rd, 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 Mk3 .308 Win 16.1in 20rd 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 Mk3 .308 Win 16.1in 20rd 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 Mk3 .308 Win 16.1in 20rd?
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 Mk3 .308 Win 16.1in 20rd available now?
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This product is listed under: AR Rifles.
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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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FFL Transfer & Firearms Laws
All firearms, including the CMMG Resolute Mk3 .308 Win 16.1in 20rd, 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 Mk3 .308 Win 16.1in 20rd 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.
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