CMMG Resolute MK4 338 ARC 16.1" Tungsten

The CMMG Resolute MK4: Large-Bore Versatility in AR15 Form

The CMMG Resolute MK4 in 338 ARC represents a thoughtful evolution of the modern sporting rifle. This cartridge combines the proven reliability of the AR15 platform with the terminal performance of a true large-bore caliber—delivering more energy downrange than smaller alternatives while maintaining the sub- and supersonic flexibility that modern shooters demand.

Key Features

• 338 ARC Chambering: Purpose-built for both suppressed and unsuppressed shooting with minimal gas system adjustment
• 16.1" Black Nitride Barrel: Durable, corrosion-resistant finish with a threaded muzzle for suppressor mounting
• Tungsten Cerakote Receiver: Distinctive tungsten finish on aluminum upper and lower receivers
• M-LOK Handguard: Modern mounting system for lights, optics, and accessories
• CMMG Ripstock: Tungsten polymer stock for a cohesive aesthetic and reliable performance
• CMMG Zeroed Grip: Ergonomic controls designed for intuitive operation
• Picatinny Rail: Integrated top rail for optic mounting
• 10+1 Capacity: Magazine-fed with standard AR15 magazines

Why 338 ARC?

The 338 ARC bridges the gap between the versatility of 300 Blackout and the raw power shooters expect from a large-bore rifle. Whether you're running a suppressor for subsonic loads or pushing supersonic rounds downrange, this cartridge delivers consistent performance without the extensive tuning required by other calibers.

This is a rifle built for shooters who understand that capability and reliability matter more than trends.