CMMG Dissent BR4 .350 Legend 16.10in 10+1 Magpul SGA

About this product

The CMMG Dissent BR4 .350 Legend 16.10in is a modern, purpose-built AR-platform rifle chambered for the straight-wall .350 Legend cartridge. Created in 2019 by Winchester to fulfill specific hunting regulations, the .350 Legend provides notable terminal energy from a controllable short-action case, bridging a gap between traditional rifle and pistol-caliber performance. This specific CMMG Dissent configuration pairs a durable 16.10-inch barrel with a Picatinny-railed receiver and a Magpul SGA stock, shipped with two 10-round magazines.

What is the CMMG Dissent BR4 .350 Legend used for?

This rifle is primarily used for regulated hunting in Midwest states that mandate straight-wall cartridges for rifle hunting. The direct answer is that it's a tool for legal, ethical harvesting of whitetail deer and similar medium game at ranges under 200 yards, where its 1:16 twist barrel stabilizes heavy bullets like the 180-grain Winchester Deer Season XP to deliver over 2,000 ft-lbs of energy. It's also an effective choice for defensive shooters on rural properties who value a cartridge with less over-penetration risk than .308 Win, yet more authority than .300 Blackout. The platform's AR-style ergonomics allow for rapid follow-up shots controlled by the familiar Single Stage trigger.

How does the CMMG Dissent BR4 compare to the Stevens 334 .243 Win?

The CMMG Dissent BR4 is superior for hunters bound by straight-wall cartridge laws, while the Stevens 334 .243 Win — our editorial take is a better long-range, all-purpose bolt-action option. The Stevens 334, chambered in the long-proven .243 Win, offers superior inherent accuracy potential for varmint and precision deer hunting beyond 300 yards, but it is a bolt-action rifle with a 4-round internal magazine, slower to operate. The CMMG is a semi-automatic platform with a 10+1 capacity, offering faster follow-up shots at the expense of ultimate accuracy—you can expect about 1.5 to 2 MOA groups from the Dissent versus potential 1 MOA from the Savage/Stevens action, especially with handloads.

What does it weigh and what are the dimensions?

The Dissent BR4 weighs 7.70 pounds unloaded and measures 38.10 inches in overall length with the Magpul SGA stock fully extended. The direct centerpiece is the 16.10-inch barrel, finished in black nitride for corrosion resistance and threaded 9/16-24 at the muzzle for attaching the included CMMG Zeroed muzzle brake or a suppressor. While this is noticeably heavier than a standard AR-15 in 5.56 NATO (which often clocks in around 6.5 lbs), the added mass directly aids in managing the more substantial .350 Legend recoil, making it feel comparable in perceived push to a .308 Win in a heavier bolt gun.

Who is this NOT for?

This rifle is not for shooters seeking a general-purpose target plinker or a long-range precision tool. The direct answer is buyers who don't have a specific need for a straight-wall compliant semi-auto should look elsewhere. The .350 Legend ammunition, while growing, is still more expensive and less varied than ubiquitous rounds like 5.56 or .308; if your state doesn't require straight-wall cartridges, a standard AR-10 or the Stevens 334 Rifle in .308 Win (our review) provides more cost-effective practice and superior long-range ballistics. It's also a poor choice for those seeking an ultra-lightweight hunting rig, as its 7.7-pound weight is significant for all-day carry compared to bolt-action alternatives.

What's in the box?

Ironclad Armory ships this configuration with the CMMG Dissent upper and lower assembled, two CMMG-branded 10-round magazines, the installed CMMG Zeroed muzzle brake, and the Magpul SGA stock. The direct answer is everything you need to start shooting after a basic function check, minus optics and ammunition. You will not find a sling, optic mount, or bore cleaning kit included. The magazines are proprietary to this platform and caliber, not interchangeable with standard AR-15 or AR-10 magazines, a critical detail for parts stocking and logistics planning.

Is the CMMG Dissent BR4 worth it at $1,819.99?

Yes, if your primary use case is regulated hunting requiring a straight-wall cartridge in a semi-automatic format. The direct answer is that at this price point, you are paying for CMMG's engineered solution to a niche problem, not for a budget AR clone. You could purchase a complete bolt-action rifle like the Stevens 334 for roughly $500 less, but you would sacrifice rapid follow-up capability. The value lies in its specific compliance, its robust nitride-finished barrel for long-term corrosive ammo resistance, and the quality of life features like the magwell cut and ambidextrous controls. For the hunter who needs what it does, there are few direct competitors that execute as well.