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Product Info for CMMG DISSENT 9mm, 16.1in Upper Receiver

CMMG revolutionized the PCC world with the Radial Delayed Blowback Operating System, now it's the 9mm DISSENT's turn to shake things up. Combining our patent-pending Compact Action and Radial Delayed Blowback with fixed ejector, this DISSENT upper group contains the entire action and recoil system into the upper receiver. The result is an incredibly soft shooting 9mm PCC compatible with a wide range of ammo loadings that also eliminates the need for a traditional AR15 buffer tube assembly.image

The 9mm DISSENT upper is compatible with mil-spec style AR15 lowers, when used with our AR Conversion Mags, as well as our MkGs and Mk17 lower receivers. A forward non-reciprocating side charger allows you to quickly manipulate the bolt while aiming downrange. Radial Delayed Blowback DISSENTS feature a reversible side charger allowing you to quickly swap the existing charging handle from left to right or vice versa.

All DISSENT Upper groups include a 1913 Picatinny rail end plate to use in place of the lower receiver buffer tube.

Specifications for CMMG DISSENT 9mm, 16.1in Upper Receiver:

Manufacturer: CMMG
Caliber: 9mm Luger
Overall Length: 25.5 in
Barrel Length: 16.1 in
Barrel Profile: Medium Taper
Barrel Twist Rate: 1-10
Firearms Threads Per Inch: 1/2x28
Handguard Type: M-LOK ATLAS S-ONE
Muzzle Device: CMMG Zeroed
Finish: Cerakote
Fabric/Material: Aluminum
Handguard Length: 15 in
Handguard Style: M-LOK w/ Top Picatinny Rail System
Gun Rail: Picatinny
Gun Type: Rifle
Gun Make: CMMG
Gun Model: CMMG Dissent MK4
Magazine Included: No

Package Contents:

  • CMMG DISSENT 9mm, 16.1in Upper Receiver

CMMG DISSENT 9mm, 16.1in Upper Receiver Orderable Models

List of Orderable Models

  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Armor Black, 99B9A0B-AB , MPN: 99B9A0B-AB , Code: 2CM-URC-73C916CC-99B9A0B-AB
  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Coyote Tan, 99B9A0B-CT , MPN: 99B9A0B-CT , Code: 2CM-URC-73C916CC-99B9A0B-CT
  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Midnight Bronze, 99B9A0B-MB , MPN: 99B9A0B-MB , Code: 2CM-URC-73C916CC-99B9A0B-MB
  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Tungsten, 99B9A0B-TNG , MPN: 99B9A0B-TNG , Code: 2CM-URC-73C916CC-99B9A0B-TNG

CMMG DISSENT 9mm, 16.1in Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Anodized Black, 99B9A0B-HCA , MPN: 99B9A0B-HCA , Code: 2CM-URC-73C916CC-99B9A0B-HCA
  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Titanium, 99B9A0B-TI , MPN: 99B9A0B-TI , Code: 2CM-URC-73C916CC-99B9A0B-TI
  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Charcoal Green, 99B9A0B-CG , MPN: 99B9A0B-CG , Code: 2CM-URC-73C916CC-99B9A0B-CG
  • CMMG DISSENT 9mm, 16.1in Upper Receiver, 1-10 Twist, 1/2 X 28 TPI, 25.5in, Sniper Grey, 99B9A0B-SG , MPN: 99B9A0B-SG , Code: 2CM-URC-73C916CC-99B9A0B-SG
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Last updated 2026-07-15 UTC.