CMMG DISSENT 9mm 10.5in Upper Group, Armor Black – AR-15

Description

The DISSENT is CMMG's answer to the whole "where does the buffer go" headache that comes with building a compact 9mm AR. Instead of the usual buffer tube and recoil spring hanging off the back of the lower, this upper packs the entire action and recoil assembly right into the receiver using CMMG's patent-pending Compact Action with Radial Delayed Blowback. The result is a build that's noticeably shorter and less bulky than a traditional AR pistol, which matters when you're chasing a tight, maneuverable package.

What Makes the DISSENT 9mm Upper Different

The 10.5" 4140 chrome-moly barrel wears a 1:10 twist and a 1/2×28 threaded muzzle capped with CMMG's Zeroed Linear Compensator, so you get real velocity out of the longer tube while keeping muzzle blast pushed forward. A 9.6" M-LOK handguard gives you slim, sleek real estate for lights, grips, and whatever else you like to hang, and the 7075-T6 aluminum receiver keeps things tough without adding weight.

Running the DISSENT Side Charger

Bolt operation happens through a forward non-reciprocating side charging handle, which lets you rack the action without pulling your support hand off the gun or coming off target. It ships on the left side but can be swapped over to the right if that suits your setup better. It's a genuinely fast, natural way to manipulate the bolt once you've run it a bit.

Building Out Your DISSENT 9mm

This is a complete upper group with the bolt carrier group installed, and it drops onto CMMG Mk4 and Mk17 lowers as well as standard mil-spec AR-15 lowers. On a mil-spec lower you'll run CMMG's 9 AR conversion magazines, which share the profile of a 5.56 mag for a familiar manual of arms, while CMMG's Glock-mag lowers open up the Glock magazine route. Since the recoil system lives up top, you swap the buffer tube for the included 1913 Picatinny rail end plate, which also gives you a mounting point for a brace, stock, or sling.