Description
The CMMG Resolute 300 MK4 5.56mm 16.1″ Barrel, 6-Position Black Stock Black Hardcoat Anodized, 30rd is a premium, duty-ready AR-15 rifle built for reliability and precision. It features a mid-length gas system, a durable hardcoat anodized finish, and a 16.1-inch barrel, making it a versatile platform for home defense, tactical training, and recreational shooting. This rifle is designed to perform under pressure and ships to Missouri and compliant US states.
Key Features
- 16.1″ 5.56 NATO Barrel: The optimal length for balancing velocity, maneuverability, and legal compliance without an NFA stamp.
- Mid-Length Gas System: Provides a smoother, more reliable recoil impulse than a carbine system, reducing wear on internal parts.
- Black Hardcoat Anodized Finish: A mil-spec Type III anodizing that offers superior corrosion and abrasion resistance for long-term durability.
- 6-Position M4-Style Stock: Adjusts to fit any shooter’s arm length and body armor, ensuring a proper cheek weld and shooting stance.
- Fully Ambidextrous Controls: Includes an ambidextrous safety selector and magazine release for left or right-handed operation.
- Radian Raptor Charging Handle: A premium, oversized latch for positive manipulation under stress or with gloves on.
Specifications & Details
| Caliber | 5.56x45mm NATO / .223 Remington |
| Barrel Length | 16.1 inches |
| Overall Length (Extended) | Approx. 35.5 inches |
| Weight (Unloaded) | Approx. 6.8 lbs |
| Magazine Capacity | 30 Rounds (1 included) |
| Stock | 6-Position Collapsible M4 Style |
Weighing in at approximately 6.8 pounds unloaded, the Resolute 300 MK4 strikes a practical balance between stability and handling speed. The rifle comes ready to run with one 30-round magazine, and its mil-spec compatible design means you can easily upgrade triggers, grips, or handguards with a vast aftermarket selection. Here’s the thing—this is a rifle built to work with standard AR-15 parts and magazines, so customization and maintenance are straightforward. An FFL transfer is required for firearm purchases, a standard and secure process we handle for all our customers.
Who This Rifle Is For
This CMMG is for the shooter who demands a no-compromise rifle right out of the box. It’s for the Missouri homeowner who understands that when it comes to home defense, reliability isn’t a feature—it’s the only feature. It’s for the tactical training enthusiast who needs a rifle that can withstand hundreds of rounds per session without a hiccup. It’s also an excellent choice for the serious recreational shooter who appreciates precision engineering and wants a rifle that simply fits out of the box, ready for optics, lights, and a sling. At $1482.56, it represents a significant investment in a tool that won’t let you down.
Pros & Cons
Pros: The mid-length gas system is a standout, offering noticeably softer recoil for faster follow-up shots and enhanced shooter comfort. The inclusion of premium components like the Radian Raptor charging handle and ambidextrous controls adds immediate value. The hardcoat anodized finish is exceptionally tough, resisting holster wear and the elements. Its 16.1-inch barrel provides a full legal rifle configuration with excellent ballistic performance.
Cons: The price point places it above entry-level AR-15s, positioning it as a premium option. Some may prefer a free-float handguard for absolute accuracy, though the standard delta ring assembly is classic and functional. As with any complete rifle, you’re paying for CMMG’s fit, finish, and quality assurance—which is the whole point.
Frequently Asked Questions
Q: Is this rifle chambered in .300 Blackout or 5.56?
A: This specific “Resolute 300 MK4” model is chambered in 5.56x45mm NATO, which also safely fires .223 Remington. The “300” in the model name denotes CMMG’s series, not the caliber. Always confirm caliber markings on your firearm.
Q: Can I mount my own optics and accessories?
A: Absolutely. The upper receiver has a standard Picatinny rail for mounting optics, and the handguard has slots for attaching M-LOK compatible accessories. It works seamlessly with popular optics from brands like Vortex, Holosun, and Sig Sauer.
Q: What is the twist rate of the barrel?
A: The 16.1-inch barrel features a 1:7 twist rate. This is ideal for stabilizing a wide range of bullet weights, from lighter 55-grain rounds up to heavier 77-grain match ammunition, giving you great versatility for different shooting applications.
Available at firearms-missouri.com for Missouri residents and nationwide. See product page for current pricing and availability.
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