CMMG - DISSENT Mk4 300BLK 10.5"

Published on February 19, 2026
Duration: 10:57

This review of the CMMG DISSENT Mk4 300BLK highlights its compact design, internal buffer system allowing for firing with a folded brace, and an adjustable gas block for tuning loads and suppressor use. The firearm features a 10.5" barrel, M-LOK and Picatinny rail integration, and a high-quality trigger. The presenter, demonstrating experienced firearm knowledge, emphasizes the attention to detail in its fit and finish and its reliable performance across various ammunition types.

Quick Summary

The CMMG DISSENT Mk4 300BLK pistol boasts an internal buffer system in the upper receiver, allowing it to be fired with a folded brace for enhanced maneuverability. Its 10.5" barrel and adjustable gas block make it versatile for various loads and suppressor use.

Chapters

  1. 01:46Introduction to CMMG Dissent
  2. 02:11Dissent: 300 Blackout, 10.5" barrel
  3. 02:51Barrel, Adjustable Gas Block, Suppressor
  4. 03:40Zeroed Suppressor Pairing
  5. 04:10Rail System Features
  6. 05:20Upper Receiver Features
  7. 05:53Fit & Finish
  8. 06:18Lower Receiver Overview
  9. 07:33Trigger and Additional Features
  10. 08:15Strike Industries Brace
  11. 08:34Function, Reliability, and Philosophy

Frequently Asked Questions

What makes the CMMG DISSENT Mk4 300BLK unique for maneuverability?

The CMMG DISSENT Mk4 300BLK features an internal buffer and spring system within the upper receiver. This innovative design allows the firearm to be fired even when the stock or brace is folded, significantly enhancing its compact nature and maneuverability in tight spaces.

How does the adjustable gas block benefit the CMMG DISSENT Mk4 300BLK?

The adjustable gas block on the CMMG DISSENT Mk4 300BLK provides crucial tuning capabilities. It allows users to precisely adjust gas pressure for specific ammunition loads and ensures optimal cycling performance whether the firearm is used with a suppressor or unsuppressed.

What are the key features of the CMMG DISSENT Mk4 300BLK's rail system?

The rail system on the CMMG DISSENT Mk4 300BLK includes M-LOK slots on the sides for accessory attachment and a monolithic Picatinny rail on top. This setup is ideal for mounting pressure switches, lights, lasers, and other tactical accessories securely.

What is the barrel length and caliber of the CMMG DISSENT Mk4 reviewed?

The CMMG DISSENT Mk4 reviewed is chambered in 300 Blackout and features a 10.5-inch barrel. This barrel length is considered a hybrid, offering a balance between sufficient velocity for defense and hunting, and compactness for maneuverability.

Related News

All News →

More from 704 TACTICAL

View all →