CMMG Dissent Mk4 Pistol, .300 Blackout, 10.5-Inch, Midnight Bronze

The CMMG Dissent Mk4 pistol in .300 AAC Blackout with a Midnight Bronze Cerakote finish (brand part no. 30AC278MB) pairs a 10.5-inch barrel with CMMG’s buffer-less Compact Action, letting the cartridge’s full ballistic potential run through a genuinely compact platform. CMMG fits an adjustable gas block to fine-tune the system for supersonic or subsonic .300 Blackout loads, and a TriggerTech AR-D trigger, developed specifically for Dissent builds, breaks at roughly 4 pounds. The rear of the receiver carries a 1913 Picatinny rail end plate in place of a buffer tube, letting shooters add a folding pistol brace or stock to suit their needs. Among AR pistols built for maximum portability, this midnight bronze Dissent configuration favors shooters who want a longer .300 Blackout barrel without giving up compactness.

Key Specifications

• Chambered in .300 AAC Blackout, this pistol runs a 30+1 capacity magazine.
• The barrel measures 10.5 inches.
• The operating system is CMMG’s Compact Action, eliminating the buffer tube entirely.
• An adjustable gas block tunes the system for supersonic or subsonic loads.
• The trigger is a TriggerTech AR-D unit, breaking at approximately 4 pounds.
• The rear of the receiver carries a 1913 Picatinny rail end plate in place of a buffer tube.
• That end plate is ready for the shooter to add a folding brace or stock separately.
• The safety is a CMMG ZEROED ambidextrous selector.
• The finish is Midnight Bronze Cerakote.

Frequently Asked Questions

Does this pistol include a brace? No, it ships with a Picatinny rail end plate, ready for the shooter to add a folding brace or stock separately.

What trigger does it use? A TriggerTech AR-D trigger developed specifically for Dissent builds, with roughly a 4-pound pull.

Can the gas system be adjusted? Yes, an adjustable gas block tunes the Dissent for supersonic or subsonic .300 Blackout loads.

Buy the CMMG Dissent Mk4 Pistol, .300 Blackout, Midnight Bronze

A longer 10.5-inch barrel and CMMG’s buffer-less Compact Action make this Dissent a versatile .300 Blackout platform. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.