Description
Picture this: a sounder of hogs is tearing through your bottomland at last light. You need a round that hits with authority, a platform you can trust in the brush, and a rifle that bridges the gap between a nimble carbine and a hard-hitting woods gun. That’s the exact scenario the CMMG Resolute 300 MK4 in .350 Legend was built for. It’s a purpose-driven modern sporting rifle chambered in a straight-walled cartridge designed for power and compliance, offering a potent, mid-range solution for hunters and defenders who demand more than a standard 5.56.
The CMMG Resolute 300 MK4, .350 Legend, 16.1″ Barrel, M-LOK, Gray, 10rd is a modern sporting rifle built on the proven AR platform, chambered in the straight-walled .350 Legend cartridge. It features a 16.1-inch barrel for optimal velocity, a free-floating M-LOK handguard for accessory mounting, a subdued gray finish, and ships with a 10-round magazine. This configuration is engineered for hunting medium game in restrictive states and for serious home defense where barrier penetration is a concern.
When it comes to home defense or hunting in dense timber, over-penetration and terminal performance are critical. The .350 Legend cartridge addresses this directly. It delivers significantly more energy than a 5.56 NATO or .300 Blackout from a similar barrel length, with ballistics that are flatter than a .30-30. This means you have a decisive advantage on deer, hog, or bear inside 200 yards. The 16.1-inch barrel is the sweet spot—long enough to maximize the cartridge’s potential without turning the rifle into an unwieldy club in a blind or a hallway.
The heart of the system is CMMG’s Mk4 upper and lower receiver set, known for tight tolerances and reliable function. The gray Cerakote finish isn’t just for looks; it provides a durable, corrosion-resistant layer that stands up to Missouri’s humid summers and wet winters. The 13-inch M-LOK handguard is where practicality shines. It’s lightweight, free-floating for accuracy, and offers a full 3, 6, and 9 o’clock rail for mounting lights, lasers, or a forward grip. You can configure it exactly to your mission—no gunsmithing required. The rifle uses a standard mil-spec AR-15 fire control group, so triggers from brands like Geissele or LaRue are drop-in ready for those seeking a crisper pull.
Weighing in at approximately 6.5 pounds unloaded, the Resolute 300 balances well and handles quickly. The 10-round magazine capacity is practical for most hunting regulations and defensive scenarios, keeping the profile lean. At $1482.56, you’re investing in a specialized tool from a respected manufacturer, not just another AR. It’s available at firearms-missouri.com for Missouri residents and nationwide, with all necessary compliance checks.
| Caliber | .350 Legend |
| Barrel Length | 16.1 inches |
| Handguard | 13-inch M-LOK |
| Finish | Gray Cerakote |
| Magazine Capacity | 10 Rounds |
| Action | Direct Impingement Semi-Auto |
Pros & Cons
The major pro is the cartridge’s purpose-built performance. It’s a legitimate hunting round in states requiring straight-walled cartridges, and it hits harder than many common defensive calibers. The M-LOK platform offers immense versatility, and CMMG’s build quality is consistently solid. The con? .350 Legend ammo, while growing, isn’t as ubiquitous or cheap as 5.56. It’s also a single-purpose caliber—you wouldn’t use it for long-range target shooting or varmint control. Recoil is more pronounced than a 5.56, but it’s very manageable.
Who It’s For
This rifle is for the Midwestern hunter who needs a compliant, semi-automatic platform for deer season. It’s for the landowner dealing with feral hogs that require quick, powerful follow-up shots. It’s also for the serious home defender who prioritizes stopping power and is mindful of over-penetration risks in suburban or rural settings. If your needs are within 200 yards and demand authority, this is your tool.
Frequently Asked Questions
Q: Will this rifle work with my existing AR-15 magazines and parts?
A: It uses a standard AR-15 lower receiver, so grips, stocks, and triggers are compatible. However, .350 Legend requires specific magazines due to the larger cartridge case diameter. It ships with the correct 10-round mag, and dedicated .350 Legend magazines from CMMG or other manufacturers are needed for reliable feeding.
Q: Is the .350 Legend suitable for deer hunting in Missouri?
A: Absolutely. The .350 Legend meets and exceeds the energy requirements for deer and feral hog in Missouri. Its straight-walled design also makes it legal for use in several other Midwestern states with similar cartridge restrictions, giving you a versatile hunting rifle for regional travel.
Q: What optics are recommended for this setup?
A: Given its effective range, a low-power variable optic (LPVO) in a 1-6x or 1-8x configuration is an excellent match. A high-quality red dot sight is also perfect for fast, close-range work on hogs or for defensive use. The M-LOK handguard and Picatinny top rail support any standard mount.
Ready to add this capable, purpose-built platform to your arsenal? Contact us to check availability and start the purchase process.
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