User Ratings
No ratings yet
Be the first to review this product
Overview
CMMG DISSENT Upper Group MK4 in Armor Black Cerakote featuring Compact Action direct impingement with the action and recoil assembly housed inside the upper receiver. Includes a forward non-reciprocating left-side charger and a 9.6" proprietary M-LOK handguard with a full-length top Picatinny rail. The included 1913 Picatinny rail end cap replaces the standard lower receiver buffer tube.
Key Features
- Ultra-compact 5.56x45mm platform with a 6.5" barrel
- Patent-pending Compact Action direct impingement design
- Forward non-reciprocating left-side charging handle
- Adjustable gas block for tuning (suppressed/unsuppressed)
- 9.6" M-LOK handguard with full-length top Picatinny rail
- 1913 Picatinny rail end cap included
Specifications
- Brand: CMMG
- Finish: Armor Black Cerakote
- Platform: MK4
- Caliber: 5.56x45mm
- Operating System: Compact Action - Direct Impingement
- Barrel Length: 6.5"
- Barrel Twist: 1:7
- Barrel Contour: MT
- Barrel Material: 4140CM, SBN
- Muzzle Device: CMMG ZEROED Blast Compensator
- Muzzle Thread: 1/2 x 28
- Gas Port Location: Pistol
- Gas Block: Adjustable .750"
- Upper Receiver: DISSENT 7075 T6 Aluminum
- Handguard: CMMG 9.6" Proprietary M-LOK
- Charging Handle: DISSENT Side Charger - Left
- Receiver Extension: 1913 Picatinny Rail End Cap
- UPC: 810097509344
- MPN: CMM55B9331AB
NFA Note: 6.5" DISSENT upper groups are designed for use in a pistol configuration. Using a pistol upper with a stock or stabilizing brace on the lower receiver may classify the DISSENT as a Short-Barreled Rifle (SBR) under the National Firearms Act (NFA).
Specifications
- Manufacturer:
- CMMG
- Category:
- upper-receiver
- Platforms:
- AR-15
- Interfaces:
- Muzzle thread: 1/2-28Magpul M-LOKMIL-STD-1913
- Length:
- 6.5"
- UPC:
- 8258484338810
- MPN:
- CMM55B9331AB
- Required Component:
- Yes
Parts Cabinet
Track parts you own or plan to buy.
Where to Buy
Have one to sell?
Sponsored
MantisX
The smart way to train your AR build
Built your rifle — now train it. BlackBeardX installs in minutes and turns your AR into a full dry fire system with smart feedback on every pull.
Shop BlackBeardXPrice History
Current
$1,304.98
Lowest
$1,304.98
Highest
$1,304.98
Price Alert
Sign in to save a target price and receive an email when this component drops.
Sign In to Set AlertSimilar Products
Bravo Company BCM4 Upper Receiver Assembly Flat Top With Forward Assist 1913 Rail
Bravo Company Manufacturing (BCM)
$129.00
Aero Precision AR15 Assembled Upper Receiver - Anodized Black - APAR501603AC
Aero Precision
$118.99
LMT Monolithic Upper Receiver - AR-15 - MRP-L - M-LOK - Specwar - 11.5"
LMT
$912.60
Griffin Armament Mk1 Upper Receiver Assembled Aluminum Black
Griffin Armament
$113.95
Bravo Company 4URM4 BCM M4 Upper Assembly Multi-Caliber 7075-T6 Aluminum Black Anodized Receiver for AR-15
Bravo Company Manufacturing (BCM)
$137.04
BCM MK2 Carbine Barreled Upper MCMR-10 - 12.5in
Bravo Company Manufacturing (BCM)
$820.39
AERO PRECISION - 5.56X45 NATO ASSEMBLED UPPER RECEIVER NO AUTO SEAR CUT FOR AR-15
Aero Precision
$119.99
COLT Monolithic AR-15 Pistol Complete Upper Receiver 5.56x45 NATO 11.5" Barrel
Colt
$959.99
Builds Using This Part
No builds yet — be the first to use this part.
Related Guides
Guide
5.56 NATO, .223 Remington, and .223 Wylde: Chamber Differences Explained
A technical breakdown of the differences between 5.56 NATO, .223 Remington, and .223 Wylde chambers — what each accepts safely, and how to choose for your build.
5 min read
Guide
AR-10 Receiver Patterns: DPMS vs. Armalite Compatibility
The AR-10 has two incompatible receiver patterns — DPMS and Armalite — that look similar but do not share parts. This guide explains the differences and how to buy correctly.
6 min read
Guide
The AR-10 Platform: What It Is and How It Differs from the AR-15
A practical overview of the AR-10 — its origins, how it differs from the AR-15, available calibers, and when it makes more sense than a standard AR-15 build.
6 min read