CMMG Dissent MK4 338 ARC 10.5" Barrel AR Pistol - Armor Black

The CMMG Dissent MK4 in 338 ARC delivers exceptional stopping power in a compact AR pistol platform. This 10.5-inch barreled firearm bridges the gap between traditional AR-15 capabilities and larger caliber performance, offering hunters and tactical shooters a versatile solution for medium to large game applications.

What Makes This Different

Built on CMMG's proven MK4 platform, this Dissent model chambers the potent 338 ARC cartridge - a round that outperforms traditional .308 Winchester in shorter barrels while maintaining manageable recoil. The 10.5-inch barrel length optimizes velocity retention for the 338 ARC, delivering approximately 2,200 fps with 200-grain projectiles. Standard AR-15 components ensure parts availability and familiar manual of arms.

Key Features

• 338 ARC chambering provides superior ballistics over .308 Win in short barrels
• 10.5-inch 4140 chrome moly steel barrel with 1:7 twist rate
• MK4 lower receiver accepts standard AR-15 triggers and components
• Armor Black Cerakote finish resists corrosion and wear
• Standard AR-15 magazine compatibility with appropriate followers
• Mil-spec trigger group and safety selector
• Compatible with standard AR-15 accessories and optics mounts

Field performance data shows the 338 ARC maintains over 1,800 ft-lbs of energy at 200 yards from this barrel length, making it effective for deer, hogs, and similar-sized game. The cartridge's efficient powder burn in shorter barrels reduces muzzle flash compared to magnum alternatives. Competition shooters appreciate the flat trajectory and consistent accuracy potential of 1.5 MOA or better with quality ammunition.

Technical Specs

• Caliber: 338 ARC
• Barrel Length: 10.5 inches
• Twist Rate: 1:7
• Overall Length: Approximately 27 inches (stock collapsed)
• Weight: Approximately 6.5 pounds
• Finish: Armor Black Cerakote
• Receiver Material: 7075-T6 aluminum
• Barrel Material: 4140 chrome moly steel
• Thread Pitch: 5/8x24 TPI
• Magazine Compatibility: AR-15 style (with proper followers)

This Dissent MK4 represents CMMG's commitment to innovative cartridge applications in proven platforms. The 338 ARC chambering transforms the familiar AR-15 system into a capable hunting and tactical rifle while maintaining the modularity and reliability shooters expect from the platform.