CMMG Resolute MK4 300 Blackout 16.1" Coyote

CMMG Resolute MK4 .300 Blackout Rifle

The .300 Blackout cartridge was purpose-built for modern tactical shooting. Originally designed as a subsonic round for suppressed rifles, it delivers the stopping power of a .30-caliber projectile while maintaining the ergonomics and parts compatibility of the AR-15 platform.

Why .300 Blackout?

.300 Blackout excels in several roles:

• Suppressed Performance: Subsonic loads remain subsonic through the barrel, making suppressed fire genuinely quiet
• Home Defense: Effective stopping power with controlled penetration
• AR-15 Compatibility: Uses standard M4/AR-15 magazines, bolts, and receivers
• Versatility: Supersonic loads available for longer-range work

Rifle Features

The Resolute MK4 is built on the proven AR-15 platform with thoughtful upgrades:

Handguard & Mounting

• EML free-floating handguard for accuracy
• Full-length M-LOK slots on both sides and bottom
• M-LOK sections between top Picatinny rail sections
• Allows mounting of lights, lasers, and accessories without tools

Controls & Ergonomics

• ZEROED ambi safety (60/90 degree)
• Ambi magazine catch for left or right-hand operation
• Extended magazine release button for faster reloads
• Ambi charging handle for either shoulder
• ZEROED pistol grip and drop-in trigger

Additional Details

• 16.1" barrel optimized for .300 Blackout
• AR-15 muzzle brake for recoil management
• Bolt catch for tactical reloads
• Polymer dust cover
• Coyote Tan finish
• Includes Magpul 30-round PMAG

The Bottom Line

The Resolute MK4 delivers a modern, suppressor-ready rifle with genuine ambi controls. Whether you're building a home defense setup or exploring suppressed shooting, this rifle provides the platform and features serious shooters expect.