CMMG120911579
CMMG Dissent MK4 300 BLK 14.5" Pistol - Armor Black$1,787.77
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Availability: In Stock
Current Stock: Out of stock
The CMMG Dissent Mk4 pistol in 300 Blackout is a radical rethink of the AR-platform personal defense weapon. Built around CMMG's patent-pending Compact Action, this 300 Blk uses a direct-impingement system housed entirely in the upper receiver—eliminating the traditional buffer tube that takes up real estate you don't have in a compact package. The result is a 15.7-inch overall length firearm that hits hard with .30 caliber power without sacrificing the controls and modularity shooters expect from modern AR pistols.
If you've run AR pistols before, the Dissent Mk4 300 Blackout feels familiar where it counts. You get full ambidextrous controls, a non-reciprocating side charger (switchable for lefty or righty operation), and a 1913 Picatinny rail at the rear receiver for mounting a brace or stock of your choice. The 6.5-inch barrel wears a 1:7 twist and a CMMG ZEROED linear compensator (5/8x24 threads), and the gas block is adjustable for tuning reliability with various ammunition loads. At 4.8 pounds, it's genuinely compact without feeling skeletal.
Build quality reflects CMMG's attention to detail. Both upper and lower receivers are forged 7075 T6 aluminum, the handguard is CMMG's proprietary design, and the trigger is a CMMG ZEROED drop-in single-stage. Everything wears a professional Armor Black Cerakote finish. The package ships with a 30-round Magpul PMAG sized for 300 BLK, a CMMG ZEROED pistol grip, trigger guard, and 60/90-degree safety selector. This is a no-compromise compact platform for shooters serious about 300 Blackout in the tightest spaces.
| Platform | Mk4 |
| Caliber | .300 BLK |
| Operating System | Compact Action Direct Impingement |
| Barrel Length | 6.5 inches |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM SBN |
| Barrel Contour | MT |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 5/8 x 24 |
| Gas Block | Adjustable .750 |
| Gas Port | Pistol |
| Upper Receiver | DISSENT 7075 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Handguard | CMMG 5.5 Proprietary |
| Charging Handle | DISSENT Non-Reciprocating Side Charger (Left) |
| Pistol Grip | CMMG ZEROED |
| Receiver Extension | 1913 Picatinny Rail End Cap |
| Trigger Type | CMMG ZEROED Drop-In Single Stage |
| Trigger Guard | CMMG ZEROED |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Finish | Armor Black Cerakote |
| Overall Length | 15.7 inches |
| Weight | 4.8 lbs |
| Magazine Included | Magpul 30-Round 300 BLK PMAG |
The Compact Action houses the entire recoil system in the upper receiver, eliminating the traditional buffer tube. This design makes the Dissent substantially more compact while maintaining the core AR ergonomics and controls shooters know.
Yes. The Dissent features a non-reciprocating side charger that can be switched between left and right-hand operation depending on your preference.
The rear of the lower receiver features a 1913 Picatinny rail section, allowing you to attach any compatible brace or stock of your choice.
The Dissent Mk4 ships with a 30-round Magpul 300 BLK magazine and all the CMMG ZEROED components installed (pistol grip, trigger guard, safety selector, and trigger).
SKU: 198468751 • Weight: 6.55oz
Availability: In Stock
Current Stock: Out of stock
The CMMG Dissent Mk4 pistol in 300 Blackout is a radical rethink of the AR-platform personal defense weapon. Built around CMMG's patent-pending Compact Action, this 300 Blk uses a direct-impingement system housed entirely in the upper receiver—eliminating the traditional buffer tube that takes up real estate you don't have in a compact package. The result is a 15.7-inch overall length firearm that hits hard with .30 caliber power without sacrificing the controls and modularity shooters expect from modern AR pistols.
If you've run AR pistols before, the Dissent Mk4 300 Blackout feels familiar where it counts. You get full ambidextrous controls, a non-reciprocating side charger (switchable for lefty or righty operation), and a 1913 Picatinny rail at the rear receiver for mounting a brace or stock of your choice. The 6.5-inch barrel wears a 1:7 twist and a CMMG ZEROED linear compensator (5/8x24 threads), and the gas block is adjustable for tuning reliability with various ammunition loads. At 4.8 pounds, it's genuinely compact without feeling skeletal.
Build quality reflects CMMG's attention to detail. Both upper and lower receivers are forged 7075 T6 aluminum, the handguard is CMMG's proprietary design, and the trigger is a CMMG ZEROED drop-in single-stage. Everything wears a professional Armor Black Cerakote finish. The package ships with a 30-round Magpul PMAG sized for 300 BLK, a CMMG ZEROED pistol grip, trigger guard, and 60/90-degree safety selector. This is a no-compromise compact platform for shooters serious about 300 Blackout in the tightest spaces.
| Platform | Mk4 |
| Caliber | .300 BLK |
| Operating System | Compact Action Direct Impingement |
| Barrel Length | 6.5 inches |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM SBN |
| Barrel Contour | MT |
| Muzzle Device | CMMG ZEROED Linear Compensator |
| Muzzle Thread | 5/8 x 24 |
| Gas Block | Adjustable .750 |
| Gas Port | Pistol |
| Upper Receiver | DISSENT 7075 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Handguard | CMMG 5.5 Proprietary |
| Charging Handle | DISSENT Non-Reciprocating Side Charger (Left) |
| Pistol Grip | CMMG ZEROED |
| Receiver Extension | 1913 Picatinny Rail End Cap |
| Trigger Type | CMMG ZEROED Drop-In Single Stage |
| Trigger Guard | CMMG ZEROED |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Finish | Armor Black Cerakote |
| Overall Length | 15.7 inches |
| Weight | 4.8 lbs |
| Magazine Included | Magpul 30-Round 300 BLK PMAG |
The Compact Action houses the entire recoil system in the upper receiver, eliminating the traditional buffer tube. This design makes the Dissent substantially more compact while maintaining the core AR ergonomics and controls shooters know.
Yes. The Dissent features a non-reciprocating side charger that can be switched between left and right-hand operation depending on your preference.
The rear of the lower receiver features a 1913 Picatinny rail section, allowing you to attach any compatible brace or stock of your choice.
The Dissent Mk4 ships with a 30-round Magpul 300 BLK magazine and all the CMMG ZEROED components installed (pistol grip, trigger guard, safety selector, and trigger).
SKU: 198468751 • Weight: 6.55oz