Among the myriad introductions at SHOT Show 2019 was a straight-wall rifle cartridge dubbed 350 Legend. The leading company behind the charge is Winchester, but it wasn’t until a day later that CMMG Inc., announced not only a rifle, but a series of direct-impingement semi-automatics compatible for use with this newly designed cartridge. At the top tier of the series, the Resolute 300 MK4 boasts forged aluminum receivers featuring Cerakote finishes and components AR builders know the company for. To learn more, watch our NRA Gun of the Week video hosted by American Rifleman’s Kelly Young.
Specifications:
Manufacturer: CMMG Inc.
Model: Resolute 300 MK4
Action Type: gas-operated, semi-automatic center-fire rifle
Chambering: 350 Legend
Receivers: forged aluminum, Cerakote Sniper Grey finish
Barrel: 16.1”, chrome-moly steel
Stock: CMMG RipStock; five-position adjustable
Magazine: 10-round detachable box
Sights: none; Picatinny rail
Trigger: two-stage; 4-lb., 8-oz. pull
Weight: 6 lbs., 5 ozs.
MSRP: $1,550
Additional Reading:
SHOT Show 2019: Winchester 350 Legend Ammunition
Tested: CMMG Guard Pistol Caliber Carbines
SHOT Show 2019: CMMG Resolute Carbines in 350 Legend
Tested: CMMG MK4 Banshee .22 LR Pistol
Top 5 Reasons to Shop for ARs Right Now
NRA Gun of the Week: CMMG Resolute 300 MK4 Rifle
More like this from around the NRA
Latest
New For 2026: FN 309 MRD
For 2026, FN is seeking to bring its handguns to a wider market with the FN 309 MRD, a no-frills affordable pistol that the company says is “easy to shoot, easy to use and easy to own.”
Handloads: A Cheap .38 Special Target Load
These times of sparsely available handloading components require scrimping here and there in order to continue shooting, and the .38 Special provides a lot of bang for the buck.
Jack O'Connor Guns, Books & Art Up For Auction
A number of books and firearms, along with some art pieces, that have a direct connection to famed outdoor writer Jack O'Connor are up for auction at GunBroker.
![Oconnor Small[67]](/media/bu2le2tp/oconnor-small-67.jpg?anchor=center&mode=crop&width=770&height=430&rnd=134126774953630000&quality=60)
![Oconnor Small[67]](/media/bu2le2tp/oconnor-small-67.jpg?anchor=center&mode=crop&width=150&height=150&rnd=134126774953630000&quality=60)
Building Christensen Rifles: A Hands-On View
A cutting-edge enterprise takes on the lightweight-hunting-rifle market with models that defy expectations—all without flinching.
New For 2026: 25 WBY RPM
The 25 WBY RPM is the 17th proprietary cartridge developed by Weatherby, a company whose name is synonymous with magnum cartridges and bullet speed.
The Armed Citizen® Jan. 12, 2026
Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.
Interests
SECTIONS
IN THE SPOTLIGHT
EXPLORE MORE NRA PUBLICATIONS
