Compact AR-style pistol in .300 AAC Blackout with a 10.5″ barrel, adjustable gas block, TriggerTech AR‑D trigger, Cerakote bronze finish, and two 30-round magazines.
The CMMG DISSENT MK4 is a compact AR-style pistol chambered in .300 AAC Blackout with a 10.5″ barrel. It is built for short-range work where a compact footprint and modularity matter, and it features an adjustable gas block to tune the system for supersonic or subsonic loads. For a practical optic choice that stays well under specialty optic budgets, pair this pistol with a close-quarters 1x red dot such as the Holosun HS510C for fast, reliable sighting.
Product Specifications
The manufacturer is CMMG.
The model is DISSENT MK4.
The manufacturer’s part number is 30AC278MB.
The caliber is .300 AAC Blackout.
The action is Semi-Auto.
The barrel measures 10.5 inches.
The overall length is 18.70 inches.
The magazine capacity is 30 + 1 rounds.
The package includes two magazines.
The optic footprint is PICATINNY.
The handguard is a 5.5″ M-LOK design for accessory mounting.
The trigger is a TriggerTech AR-D with a 4 lb pull weight as delivered from the factory.
The gas system includes an adjustable gas block for tuning with different 300 BLK loads.
The muzzle is threaded 5/8-24 for standard muzzle devices and suppressor mounts.
The UPC is 810097509672.
This DISSENT MK4 balances compact handling and shooter-focused features: an optimized TriggerTech trigger for a light, repeatable break; a tuneable gas system for both supersonic and subsonic ammunition; and M-LOK attachment points for practical accessory layout. Its short barrel and folding-capable end plate make it a straightforward option for users who need a portable, modular AR platform configured around the .300 BLK cartridge.
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