CMMG Dissent MK4 300 Blackout 10.50″ 30+1 AR Pistol

The CMMG Dissent MK4 300 Blackout 10.50″ 30+1 AR Pistol is a compact personal defense weapon that rethinks how an AR-style platform fits in your hands. By moving the recoil system into the upper receiver, CMMG eliminates the buffer tube—shrinking the overall length without sacrificing reliability. Chambered in .300 AAC Blackout, this pistol gives you hard-hitting subsonic and supersonic performance in a package that’s easy for new and experienced shooters to manage.

Key Features

• Compact Action Upper — The recoil system sits entirely in the upper receiver, so there’s no buffer tube sticking out back. Why it matters: You get a shorter overall length than a standard AR pistol, making it easier to maneuver in tight spaces and store in a safe or range bag.
• Forward Non-Reciprocating Side Charger — The charging handle stays forward and doesn’t move when you fire. Why it matters: You can cycle the action without shifting your grip or worrying about a reciprocating handle hitting your hand, which is a big plus for newer shooters learning to clear malfunctions.
• Ambidextrous Controls — The safety selector, magazine release, and bolt catch are all reachable from either side. Why it matters: Left-handed shooters can run the gun without swapping parts, and right-handed shooters get a natural support-hand control for faster reloads.
• Black Armor Cerakote Finish — A durable, corrosion-resistant coating on all exposed metal surfaces. Why it matters: This finish holds up to sweat, rain, and range dust, so the pistol looks good and stays protected through years of family outings.
• 30+1 Round Capacity — The included magazine holds 30 rounds, plus one in the chamber. Why it matters: You get plenty of firepower for home defense or a full day of plinking without constant reloads, which is especially helpful when you’re teaching someone new.

Who It’s For

This pistol is built for families who want a compact defense tool that’s easy to handle. The short overall length and lightweight design make it a good fit for shooters with smaller frames, and the .300 Blackout round is versatile enough for both subsonic training loads and supersonic defensive ammo. If you’re a beginner looking for an AR-style platform that doesn’t require a buffer tube—or a seasoned shooter wanting a packable truck gun—this one’s worth a close look.

Pros and Cons

• Pro: No buffer tube means a shorter package and more options for folding braces or stocks (where legal).
• Pro: Side charger stays still while firing, which reduces the chance of snagging on gear or clothing.
• Con: The proprietary upper means you can’t swap in a standard AR bolt carrier group or handguard without changing the whole upper—something to consider if you like to build from spare parts.

Comparison: CMMG Dissent MK4 vs. Zev Technologies OZ9 vs. Geissele Super Duty Pistol

FAQ

✅ Nationwide delivery (all 50 states)
✅ Ships 1–2 business days
✅ 30-day returns
✅ Secure checkout

Explore more options in our AR Pistols category, or check out .300 Blackout Uppers and Compact AR Platforms for similar builds.

Last updated: April 2026