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Availability: In Stock
Current Stock: Out of stock
The CMMG Dissent MK4 300 BLK 16.1" AR pistol is a purpose-built platform for shooters who want real versatility in a compact, maneuverable package. Three hundred Blackout's reputation for working equally well with subsonic and supersonic ammunition makes it ideal for suppressed shooting, close-range hunting, and target work—and this Dissent leverages that flexibility with a thoughtfully engineered gas system and shooter-friendly controls. At 6.4 pounds and collapsing to just 25.9 inches folded, it's a genuine backpack gun or truck gun that doesn't compromise on ergonomics or tuning potential.
Built on CMMG's Mk4 platform with 7075 T6 aluminum upper and lower receivers, the Dissent MK4 pairs a cold-hammer-forged 4140CM barrel with an adjustable gas block—the real differentiator here. That adjustable gas block lets you dial in your system to run cleanly with whatever ammunition you prefer, whether you're running heavy, subsonic rounds through a suppressor or faster supersonic loads at the range. The 16.1" barrel provides the velocity and dwell time that makes 300 BLK shine without sacrificing the compact handling you're after.
The ergonomic package reflects genuine field thinking. The Dissent side-folding stock offers adjustable length of pull and a cheek riser for shooting comfort, while the non-reciprocating side charging handle keeps you on target and off the magazine well. The proprietary M-LOK handguard includes a top Picatinny rail, giving you mounting real estate for optics, lights, or thermal without hunting for adapters. Two Magpul 30-round magazines come included, and the CMMG ZEROED trigger, safety, and pistol grip round out a cohesive, reliable build.
If you're looking for a 300 Blackout AR that's equally at home on a hunting pack, in a vehicle, or on the bench, the Dissent's compact footprint, tunable gas system, and folding ergonomics make it a serious contender.
| Brand | CMMG |
| Model | Dissent MK4 |
| Caliber | .300 BLK |
| Barrel Length | 16.1" |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM SBN |
| Barrel Contour | MT |
| Upper Receiver | DISSENT 7075 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Operating System | Compact Action-Direct Impingement |
| Gas Block | Adjustable 0.750" |
| Gas Port Location | Carbine |
| Handguard | CMMG 15" Proprietary M-LOK |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 5/8 x 24 |
| Charging Handle | Dissent Side Charger (Reversible) |
| Stock/Brace | DISSENT Side Folding Stock, Adjustable LOP & Cheek Riser |
| Receiver Extension | DISSENT Folding Stock Adapter |
| Trigger | CMMG ZEROED Drop-In |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Pistol Grip | CMMG ZEROED |
| Trigger Guard | CMMG ZEROED |
| Magazines Included | 2x Magpul 300 BLK 30rd PMAG |
| Weight | 6.4 lbs |
| Length (Extended) | 35.5" |
| Length (Folded) | 25.9" |
| Finish | Cerakote (Armored Black) |
Yes. The adjustable gas block lets you dial the system in for both suppressed subsonic ammunition and unsuppressed supersonic loads, which is one of the Dissent's real strengths with 300 Blackout.
It accepts standard 300 BLK magazines. Two Magpul 300 BLK 30-round PMAGs are included with the rifle.
Yes. The Dissent side-folding stock collapses the rifle to 25.9 inches, making it ideal for vehicle storage, backpack carry, or tight spaces. The stock also features adjustable length of pull and a cheek riser for shooter comfort when deployed.
The side charging handle is reversible, allowing it to be configured for either hand preference.
SKU: 120914718 • Weight: 1oz
Availability: In Stock
Current Stock: Out of stock
The CMMG Dissent MK4 300 BLK 16.1" AR pistol is a purpose-built platform for shooters who want real versatility in a compact, maneuverable package. Three hundred Blackout's reputation for working equally well with subsonic and supersonic ammunition makes it ideal for suppressed shooting, close-range hunting, and target work—and this Dissent leverages that flexibility with a thoughtfully engineered gas system and shooter-friendly controls. At 6.4 pounds and collapsing to just 25.9 inches folded, it's a genuine backpack gun or truck gun that doesn't compromise on ergonomics or tuning potential.
Built on CMMG's Mk4 platform with 7075 T6 aluminum upper and lower receivers, the Dissent MK4 pairs a cold-hammer-forged 4140CM barrel with an adjustable gas block—the real differentiator here. That adjustable gas block lets you dial in your system to run cleanly with whatever ammunition you prefer, whether you're running heavy, subsonic rounds through a suppressor or faster supersonic loads at the range. The 16.1" barrel provides the velocity and dwell time that makes 300 BLK shine without sacrificing the compact handling you're after.
The ergonomic package reflects genuine field thinking. The Dissent side-folding stock offers adjustable length of pull and a cheek riser for shooting comfort, while the non-reciprocating side charging handle keeps you on target and off the magazine well. The proprietary M-LOK handguard includes a top Picatinny rail, giving you mounting real estate for optics, lights, or thermal without hunting for adapters. Two Magpul 30-round magazines come included, and the CMMG ZEROED trigger, safety, and pistol grip round out a cohesive, reliable build.
If you're looking for a 300 Blackout AR that's equally at home on a hunting pack, in a vehicle, or on the bench, the Dissent's compact footprint, tunable gas system, and folding ergonomics make it a serious contender.
| Brand | CMMG |
| Model | Dissent MK4 |
| Caliber | .300 BLK |
| Barrel Length | 16.1" |
| Barrel Twist | 1:7 |
| Barrel Material | 4140CM SBN |
| Barrel Contour | MT |
| Upper Receiver | DISSENT 7075 T6 Aluminum |
| Lower Receiver | Mk4 Forged 7075 T6 Aluminum |
| Operating System | Compact Action-Direct Impingement |
| Gas Block | Adjustable 0.750" |
| Gas Port Location | Carbine |
| Handguard | CMMG 15" Proprietary M-LOK |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 5/8 x 24 |
| Charging Handle | Dissent Side Charger (Reversible) |
| Stock/Brace | DISSENT Side Folding Stock, Adjustable LOP & Cheek Riser |
| Receiver Extension | DISSENT Folding Stock Adapter |
| Trigger | CMMG ZEROED Drop-In |
| Safety Selector | CMMG ZEROED 60/90 Degree |
| Pistol Grip | CMMG ZEROED |
| Trigger Guard | CMMG ZEROED |
| Magazines Included | 2x Magpul 300 BLK 30rd PMAG |
| Weight | 6.4 lbs |
| Length (Extended) | 35.5" |
| Length (Folded) | 25.9" |
| Finish | Cerakote (Armored Black) |
Yes. The adjustable gas block lets you dial the system in for both suppressed subsonic ammunition and unsuppressed supersonic loads, which is one of the Dissent's real strengths with 300 Blackout.
It accepts standard 300 BLK magazines. Two Magpul 300 BLK 30-round PMAGs are included with the rifle.
Yes. The Dissent side-folding stock collapses the rifle to 25.9 inches, making it ideal for vehicle storage, backpack carry, or tight spaces. The stock also features adjustable length of pull and a cheek riser for shooter comfort when deployed.
The side charging handle is reversible, allowing it to be configured for either hand preference.
SKU: 120914718 • Weight: 1oz