CMMG Dissent MK4 300 BLK 10.5″, Armor Black, M-LOK, Side

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CMMG 30BC239AB Dissent MK4 300 Blackout 10.50″, Left Side Charging Handle, Armor Black, Zeroed Linear Comp, 9.60″ M-LOK Handguard, Picatinny End Plate, Fits AR-Platform

Its no secret that pistol stabilizing braces have been a target for scrutiny over the years, and those that enjoy building their own AR pistols have wondered what will come out of all the uncertainty. DISSENT is CMMG’s answer. Utilizing CMMG’s patent pending Compact Action and Radial Delayed Blowback technology with fixed ejector, DISSENT upper group houses the entire action and recoil assembly in the upper receiver, resulting in less bulk and length than traditional AR pistols. The forward non-reciprocating side charger allows for quick bolt operation without coming off target. DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower receiver buffer tube.

$1,197.99

3 in stock

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CMMG Dissent MK4 300 Blackout – 10.5″, Left Side Charging, Armor Black 💥

Looking for a compact, hard-hitting upper that blends form, function, and pure tactical utility? The CMMG Dissent MK4 in 300 BLK is designed for shooters who demand performance without compromise.

⚙️ Key Features:

  • 10.5″ 300 Blackout barrel – optimized for short-range punch and suppressed setups
  • Left Side Charging Handle – fast, intuitive reloads without breaking your cheek weld
  • Armor Black finish – sleek, durable, and ready for rough handling
  • Zeroed Linear Compensator – directs blast forward, ideal for close-quarters and team use
  • 9.6″ M-LOK Handguard – mount lights, grips, and accessories with ease
  • Picatinny End Plate – sling-ready and mission-flexible
  • AR-platform compatibility – plug-and-play with your favorite lower

Whether you’re building a home defense rig, a truck gun, or a suppressed SBR, this upper delivers the modularity and reliability that seasoned shooters appreciate.

🔧 Built on CMMG’s revolutionary Dissent platform, this upper eliminates the buffer tube, giving you a compact profile without sacrificing AR ergonomics. That means tighter corners, faster transitions, and better maneuverability—exactly what you want when seconds matter.

💡 Perfect for tactical dads who’ve been there, done that, and want gear that just works. Pair this with your trusted lower, and you’ve got a blackout beast ready for action.

➡️ Don’t settle for standard. Upgrade to the CMMG Dissent MK4 300 Blackout and take your AR game to the next level.

UPC

810097509115

Manufacturer

CMMG

Manufacturer Part Number

30BC239AB

Barrel Finish

Black

Barrel Length

10.50"

Caliber/Gauge

.300 AAC Blackout

Rate of Twist

1:10"

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