CMMG145479043
Cmmg Dissent 55A520B-Ab Br4 556 16.1 *Ca Armbk$1,833.02
Availability: In Stock
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.
| Caliber | 6mm ARC |
| Platform | CMMG Br4 (Compact Action Direct Impingement) |
| Barrel Length | 16.1 inches |
| Barrel Material | 4140CM with SBN coating |
| Barrel Twist | 1:7.5 |
| Barrel Contour | MT |
| Muzzle Device | CMMG ZEROED Muzzle Brake, 5/8x24 threads |
| Upper Receiver | Dissent 7075 T6 Aluminum |
| Lower Receiver | Br4 Billet 7075 T6 Aluminum |
| Handguard | CMMG 15-inch proprietary, free-floated |
| Charging Handle | Dissent Side Charger (reversible) |
| Stock | Magpul SGA (Remington 870 pattern) |
| Trigger | ZEROED Drop-In Single Stage |
| Safety | Reversible Cross Bolt |
| Gas Block | Adjustable, 0.750 diameter |
| Gas System | Rifle-length |
| Magazines Included | 2x CMMG 10-round |
| Finish | Cerakote |
| Overall Length | 38.1 inches |
| Weight | 8 lbs |
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.
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.
Yes. The Dissent side-charging handle is reversible, so left-handed and right-handed shooters can set it up for their dominant hand.
The Dissent comes with two CMMG 10-round magazines sized for 6mm ARC. These are proprietary to the cartridge and the Br4 platform.
SKU: 145479046 • Width: 10.15in • Height: 3.4in • Depth: 40.85in • Weight: 10.5oz
Availability: In Stock
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.
| Caliber | 6mm ARC |
| Platform | CMMG Br4 (Compact Action Direct Impingement) |
| Barrel Length | 16.1 inches |
| Barrel Material | 4140CM with SBN coating |
| Barrel Twist | 1:7.5 |
| Barrel Contour | MT |
| Muzzle Device | CMMG ZEROED Muzzle Brake, 5/8x24 threads |
| Upper Receiver | Dissent 7075 T6 Aluminum |
| Lower Receiver | Br4 Billet 7075 T6 Aluminum |
| Handguard | CMMG 15-inch proprietary, free-floated |
| Charging Handle | Dissent Side Charger (reversible) |
| Stock | Magpul SGA (Remington 870 pattern) |
| Trigger | ZEROED Drop-In Single Stage |
| Safety | Reversible Cross Bolt |
| Gas Block | Adjustable, 0.750 diameter |
| Gas System | Rifle-length |
| Magazines Included | 2x CMMG 10-round |
| Finish | Cerakote |
| Overall Length | 38.1 inches |
| Weight | 8 lbs |
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.
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.
Yes. The Dissent side-charging handle is reversible, so left-handed and right-handed shooters can set it up for their dominant hand.
The Dissent comes with two CMMG 10-round magazines sized for 6mm ARC. These are proprietary to the cartridge and the Br4 platform.
SKU: 145479046 • Width: 10.15in • Height: 3.4in • Depth: 40.85in • Weight: 10.5oz