CMMG DISSENT MK4 5.56MM 10.5″ AB

The CMMG DISSENT MK4 5.56mm 10.5″ AB is a compact AR-style pistol built for folks who need a short, reliable rifle-caliber tool without the hassle of a buffer tube. This model uses CMMG’s patent-pending Compact Action that moves the recoil system into the upper receiver, so you get a full-length bolt carrier and a smooth cycle in a package that’s shorter than most PDWs. Chambered for .223 Rem/5.56 NATO, it comes with a 10.5-inch barrel and an adjustable gas block to dial in gas flow for suppressed use or whatever ammo you’ve got on hand. Price is $1820.79, and it’s ready to ship.

Specifications

Key Features

• Compact Action design – Why it matters: This eliminates the buffer tube, making the overall length shorter than a standard AR pistol. You can fold the stock or brace without worrying about the buffer system, giving you a more packable tool for ranch trucks or ATVs.
• Adjustable gas block – Why it matters: Tune gas flow for suppressed or unsuppressed shooting, or to match different ammo loads. Per CMMG, this lets you reduce recoil and fouling, keeping your gun running clean in dusty conditions.
• TriggerTech AR-D trigger – Why it matters: This trigger is optimized for the Compact Action, giving a crisp, consistent break with no creep. It’s a reliable upgrade over mil-spec triggers, especially for quick follow-up shots on varmints or steel.
• 10.5-inch barrel with 1:7 twist – Why it matters: The shorter barrel keeps the gun handy in tight spaces, while the 1:7 twist stabilizes heavier bullets like 62-grain and 77-grain loads. This gives you better accuracy at ranch distances out to 300 yards.
• Mil-spec bufferless system – Why it matters: The action lives in the upper receiver, so you can swap lowers or use a folding stock adapter without modifying the recoil system. It simplifies maintenance and reduces parts count.

Who It’s For

This is for ranchers, rural workers, and utility buyers who need a compact rifle-caliber pistol that fits in a truck cab, saddle scabbard, or backpack. It’s built for folks who don’t have time for finicky gear—just a tool that works when you need to deal with coyotes, feral hogs, or property defense. The bufferless design means no extra weight or length, and the adjustable gas block lets you run it suppressed without a hassle.

Pros and Cons

• Pros: Short overall length without a buffer tube; adjustable gas block for suppressor use; reliable TriggerTech trigger; easy to maintain; fits standard AR-15 magazines and parts.
• Cons: Price is higher than many standard AR pistols (around $1800 MSRP); the Compact Action is proprietary, so replacement parts are limited to CMMG; the 10.5-inch barrel produces more muzzle blast and flash than a 16-inch rifle.

Comparison: CMMG DISSENT MK4 vs. Geissele Super Duty Pistol vs. Zev Technologies OZ9C

FAQ

Ready to Buy

This CMMG DISSENT MK4 is in stock and ready to ship. Price is $1820.79. It’s a reliable, bufferless AR pistol that fits a ranch truck or a pack. Order now and we’ll have it out the door in 1-2 business days.

✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
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Browse more: AR Pistols | CMMG Firearms | Suppressor-Ready Firearms

Last updated: April 2026