The CMMG Dissent Mk4 9mm rifle in Titanium (CMMG part no. 94AC40F-TI) is a folding-stock pistol-caliber carbine that CMMG calls the most adaptable 9mm PCC around. CMMG builds it on a standard AR-15/Mk4 lower and runs 9mm AR conversion magazines that match the profile of a standard 5.56mm PMAG while loading true double-stack. Radial Delayed Blowback in the Compact Action upper gives a lighter bolt carrier group and less felt recoil across loadings from supersonic to subsonic. The side-folding stock and forward non-reciprocating charging handle keep the rifle compact and fast to operate.

Key Specifications

• The chambering is 9mm, a low-cost cartridge with a wide range of bullet weights.
• The barrel is 16.1 inches with a 4140CM profile and a 1:10 twist.
• The action is Compact Action Radial Delayed Blowback with a fixed ejector, which lightens the bolt carrier and reduces felt recoil.
• The muzzle carries a ZEROED RBB brake on a 1/2×28 thread, so standard 1/2×28 devices fit.
• Feeding is from 30-round CMMG 9mm AR conversion magazines, double-stack from bottom to feed lips with a standard AR magazine profile.
• The stock is a Dissent side-folding stock with adjustable length of pull and an adjustable cheek riser.
• The charging handle is a reversible forward non-reciprocating Dissent side charger, so you can charge the rifle without lifting off the target.
• The handguard is a 15-inch CMMG proprietary M-LOK with a top Picatinny rail for optics.
• The finish color is Titanium, which sets this version apart from the other colors of the Dissent Mk4 9mm.

Frequently Asked Questions

What magazines does the Dissent Mk4 9mm use? It uses CMMG 9mm AR conversion magazines, which share the profile of a standard 5.56mm PMAG, and the rifle comes with 30-round magazines.

Can it shoot subsonic ammunition? CMMG says the Radial Delayed Blowback Compact Action was engineered to handle 9mm loadings from supersonic to subsonic, using a fixed ejector in the upper receiver.

Does the stock fold? Yes. The Dissent side-folding stock folds the rifle to roughly 25.9 inches and adjusts for length of pull and cheek height.

Buy the CMMG Dissent Mk4 Rifle, 9mm, 16.1-Inch, Folding Stock, Titanium, Muzzle Brake, 30-Round

Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL. For other CMMG carbines, see our AR rifles. This Titanium Dissent suits owners who want a folding 9mm carbine on an AR-15 lower.