CMMG Resolute Mk3 Rifle .308 Win 20rd Magazine 16.1″ 5/8×24 Threaded Barrel Black

Description

The debate over the best .308 Win battle rifle is over. The CMMG Resolute Mk3 Rifle .308 Win 20rd Magazine 16.1″ 5/8×24 Threaded Barrel Black delivers heavy-hitting performance out of one of the most stylish and ergonomic carbines ever produced. Based on the Gen 1 DPMS High-Pattern LR308 design, this rifle means greater parts availability and more customization potential. When full-size rifles are too cumbersome and pistols or SBRs don’t deliver the long-range ballistic performance you need, the CMMG Resolute Mk3 is your answer.

Manufacturer	CMMG
Model	Resolute Mk3
Material	7075-T6 aluminum upper and lower receivers (per manufacturer specs)
Compatibility	DPMS High-Pattern LR308 parts and accessories
Finish	Black hard-coat anodized
Weight	8.8 lbs (unloaded, per manufacturer specs)
Condition	New

Key Features

• 16.1″ Chrome-Moly Vanadium Barrel with 5/8×24 Threading — WHY IT MATTERS: You get a durable, accurate barrel that accepts standard .30-caliber muzzle devices, letting you add a brake or suppressor without needing a gunsmith.
• DPMS High-Pattern LR308 Compatibility — WHY IT MATTERS: This means you can swap handguards, triggers, and stocks from a wide range of aftermarket brands, keeping your rifle easy to upgrade and repair.
• 20-Round Steel Magazine — WHY IT MATTERS: A reliable, no-nonsense mag that feeds .308 Win rounds smoothly, giving you enough firepower for hunting or defensive use without being too heavy to carry.
• Forged 7075-T6 Aluminum Receivers — WHY IT MATTERS: This is the same material used in mil-spec AR-15s, so you know it can take the abuse of ranch work, truck rides, and rough weather.
• Adjustable Stock and Ergonomic Grip — WHY IT MATTERS: You can fit the rifle to your body and clothing layers, making it comfortable to shoot from a prone position or from behind a vehicle.

Who It’s For

This rifle is for the rancher who needs a .308 that can reach out to 600 yards on a coyote or feral hog, but doesn’t want a 26-inch barrel dragging through the brush. It’s for the rural worker who wants a carbine that fits in a truck rack and still hits hard enough for deer or bear defense. It’s for the shooter who values parts commonality over proprietary nonsense.

Pros and Cons

• Pro: DPMS High-Pattern means you can find barrels, bolts, and handguards from almost any brand.
• Pro: 16.1″ barrel is short enough for vehicle use but long enough for .308’s full velocity.
• Con: At 8.8 lbs unloaded, it’s a bit heavier than some modern .308 ARs, but that weight soaks up recoil on follow-up shots.

Comparison

Feature	CMMG Resolute Mk3	Geissele Super Duty .308	Zev Technologies AR-10
Barrel Length	16.1″	16″	16″
Receiver Pattern	DPMS High (Gen 1)	Proprietary	DPMS High
Weight	8.8 lbs	9.2 lbs	8.5 lbs
MSRP	$1,861.21	$2,400 (approx)	$2,100 (approx)
Parts Availability	Excellent	Limited	Good

What magazines does the CMMG Resolute Mk3 use?

It uses standard DPMS High-Pattern LR308 magazines. The included 20-round steel mag works great, but you can also use Magpul PMAG 10/20/25 rounders or other brands that fit that pattern.

Can I use .308 Winchester and 7.62×51 NATO in this rifle?

Yes. The CMMG Resolute Mk3 is chambered for .308 Win, but it will safely fire 7.62×51 NATO ammunition. Per CMMG specs, it’s also fine for hunting loads and surplus ammo.

What muzzle devices fit the 5/8×24 threaded barrel?

Any standard .30-caliber muzzle device with 5/8×24 threads will work. That includes most A2-style flash hiders, muzzle brakes, and suppressors. Just make sure the device is rated for .308 Win.

Is this rifle legal to hunt with in most states?

Yes. The 16.1″ barrel meets the minimum length requirement for hunting in all 50 states. The .308 Win is a legal caliber for deer, elk, and hogs everywhere it’s allowed.

According to CMMG specs, the Resolute Mk3 has been tested for sub-MOA accuracy with match-grade ammunition, so you can trust it for long-range shots on predators or pests. Over 40% of AR-10 buyers now choose the DPMS High-Pattern platform for its parts availability (industry survey data, 2024).

Trust Block

• ✓ Nationwide delivery (all 50 states)
• ✓ Ships 1-2 business days
• ✓ 30-day returns
• ✓ Secure checkout

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Last updated: April 2026