The CMMG Resolute MK4 5.56 16.1″ Carbine — 30rd is a no-nonsense AR-style rifle built for folks who need a tool that works every time. Chambered in 5.56x45mm, it pairs a 16.1-inch barrel with a lightweight EML15 M-LOK handguard and the RipStock for balanced handling. This carbine ships with a 30-round Magpul PMAG and CMMG ZEROED controls, ready to go straight from the box.
| Manufacturer | CMMG (per manufacturer specs) |
|---|---|
| Model | Resolute MK4 Carbine |
| Material | 7075-T6 aluminum upper/lower receiver |
| Compatibility | Standard AR-15 accessories |
| Finish | Hardcoat anodized black |
| Weight | 6.5 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- 16.1-inch Chrome-Moly Barrel — WHY IT MATTERS: This barrel length balances velocity with maneuverability, giving you reliable performance at the range or on the ranch.
- EML15 M-LOK Handguard — WHY IT MATTERS: Lightweight and slim, it lets you mount lights, grips, or bipods without adding bulk you don’t need.
- RipStock — WHY IT MATTERS: Adjustable cheek rest and length-of-pull let you dial in a solid cheek weld fast, whether you’re shooting prone or from a truck cab.
- ZEROED Controls — WHY IT MATTERS: Ambidextrous safety selector, bolt release, and charging handle make this rifle work for lefties and righties alike.
- Magpul PMAG 30-Round Magazine — WHY IT MATTERS: Comes with a proven, durable mag you can trust for training or utility work right out of the box.
Who It’s For
This rifle is for ranchers, rural workers, and utility buyers who need a reliable carbine for coyote control, range training, or general property defense. It’s not a safe queen — it’s a working gun.
Pros/Cons
Pros: Reliable function with standard AR parts, lightweight at 6.5 lbs, ambidextrous controls, quality M-LOK handguard, and comes with a PMAG.
Cons: The trigger is a standard mil-spec unit — not as crisp as an aftermarket option like a Geissele. Plan to swap it if you want a lighter pull.
Comparison
| Feature | CMMG Resolute MK4 | Geissele Super Duty | Zev Technologies OZ9C |
|---|---|---|---|
| Caliber | 5.56x45mm | 5.56x45mm | 9mm (pistol) |
| Barrel Length | 16.1″ | 16″ | 4.5″ |
| Weight | 6.5 lbs | 6.8 lbs | 2.2 lbs |
| Handguard | EML15 M-LOK | Geissele Mk16 M-LOK | Zev Pro barrel |
| Trigger | Mil-spec | Geissele SSA-E | Timney Alpha |
| Price | $1,574 | $1,999 | $1,799 |
FAQ
What caliber is the CMMG Resolute MK4?
It’s chambered in 5.56x45mm (.223 Rem/5.56 NATO).
Does it come with a magazine?
Yes, it ships with one 30-round Magpul PMAG.
Is it compatible with standard AR-15 parts?
Yes, it accepts standard AR-15 accessories like stocks, grips, and optics.
What is the barrel length?
The barrel is 16.1 inches.
Is this rifle ambidextrous?
Yes, it features ZEROED ambidextrous controls including safety, bolt release, and charging handle.
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See more: AR Rifles | AR Uppers
Last updated: April 2026
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This CMMG Resolute MK4 5.56 16.1″ Carbine — 30rd is ideal for shooters looking to buy guns online with confidence. Built with precision engineering and tested performance, it’s a top-tier choice whether you're looking for home defense, sport shooting, or a trusted everyday carry.
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