Cmmg Dissent 60Ab40C-Ab Br4 6Mm 16.1 *Ca Armbk

The CMMG Dissent 6mm ARC is a modern AR15-platform rifle built for hunters and long-range shooters who want flat-shooting performance without the bulk and recoil of larger calibers. Chambered in 6mm ARC—a cartridge engineered to deliver extended-range ballistics that rival AR10-class rifles—this 16.1-inch rifle pairs a proven compact-action design with a purpose-built platform that keeps things manageable in the field or on the range. Whether you're hunting at distance or dialing in precision shots, the Dissent brings serious capability to a gun that feels right in your hands.

The Br4 platform is the backbone here: a billet 7075 T6 aluminum receiver set with direct impingement and an adjustable gas block for reliable cycling while keeping recoil impulse soft and predictable. The 16.1-inch barrel sports a 1:7.5 twist rate optimized for 6mm ARC, with a CMMG ZEROED muzzle brake to manage what little recoil this cartridge generates. A side-charging handle gives you the ergonomic advantage of a reciprocating charge without the traditional upper-receiver leverage, and it's reversible for left or right-hand shooters. The Magpul SGA stock and 15-inch proprietary free-floated handguard round out the package—good ergonomics, good control, good sight radius for optics mounting.

This is a Cerakote-finished aluminum build that weighs in at 8 lbs and stretches 38.1 inches overall. You get a ZEROED single-stage drop-in trigger, reversible safety, and two 10-round CMMG magazines. It's a serious purpose-built rifle for serious shooters—no hype, just engineering and accuracy.

Key Features

• 6mm ARC chambering for flat-shooting extended-range performance in an AR15 platform
• Compact-action direct impingement with adjustable gas block for soft recoil and reliable function
• 16.1-inch 4140CM barrel with 1:7.5 twist, optimized for 6mm ARC ballistics
• CMMG ZEROED muzzle brake to manage recoil and aid repeatability
• Side-charging handle (reversible) for ergonomic operation and left/right-hand shooters
• Billet 7075 T6 aluminum upper and lower receivers for durability and precision
• 15-inch proprietary handguard with free-float for consistent accuracy
• Magpul SGA stock for solid cheek weld and control
• ZEROED single-stage drop-in trigger and reversible safety
• Includes two 10-round CMMG magazines
• Cerakote finish for corrosion resistance

Specifications

Frequently Asked Questions

What is 6mm ARC and why choose it over .223 Remington?

6mm ARC (Advanced Rifle Cartridge) was designed to deliver superior extended-range ballistics and hitting power compared to .223 Remington, all while using the standard AR15 bolt face. In the CMMG Dissent's hands, it offers performance that rivals larger AR10-platform cartridges but with less recoil and in a lighter, more maneuverable package—ideal for hunters and long-range shooters who want accuracy without the bulk.

Can I use this rifle for hunting?

Yes. The 6mm ARC's ballistic profile and velocity make it suitable for extended-range hunting, and the Dissent's flat-shooting character, soft recoil, and accurate trigger support that mission. The 16.1-inch barrel and side-charging ergonomics keep it handy in the field while maintaining the velocity and energy the cartridge is designed to deliver.

Is the side-charging handle reversible for left-handed shooters?

Yes. The Dissent side-charging handle is reversible, so left-handed and right-handed shooters can set it up for their dominant hand.

What magazines does this rifle use?

The Dissent comes with two CMMG 10-round magazines sized for 6mm ARC. These are proprietary to the cartridge and the Br4 platform.