Description

The CMMG Dissent MK4 is an AR-pattern pistol built on CMMG’s MK4 receiver platform and chambered in 5.7x28mm — a high-velocity, low-recoil cartridge originally developed for the FN P90. The Dissent series is designed to deliver a compact, pistol-configuration firearm that retains AR-familiar controls and ergonomics while leveraging the flat-shooting, high-capacity characteristics of the 5.7x28mm cartridge. The 6.5″ barrel keeps overall length compact for a pistol-format build, and the 32-round magazine capacity provides a meaningful supply of ammunition for training and defensive applications.

The MK4 designation refers to CMMG’s standard AR-15-pattern lower receiver geometry, meaning the Dissent MK4 accepts AR-15-compatible lower parts kits, pistol braces or stocks (subject to applicable law), and standard AR-pattern accessories and controls. The Tungsten Cerakote finish provides a durable, corrosion-resistant surface.

[PENDING VERIFICATION: Add confirmed operating system description here — likely CMMG’s radial delayed blowback system; verify against CMMG product page before publishing. Add at least one specific compatible accessory by exact model name (e.g., compatible pistol brace or optic mount) once verified against CMMG documentation.]

Key Features

• Firearm Type: Semi-automatic pistol
• Action: Semi-automatic
• Caliber: 5.7x28mm
• Capacity: 32 rounds
• Barrel Length: 6.5″
• Twist Rate: [Verify from CMMG spec sheet before publishing]
• Weight (Unloaded): Not specified
• Threaded Barrel: [Verify from CMMG spec sheet before publishing — affects compliance in several jurisdictions]

Use Case

• Chambered in 5.7x28mm, delivering high-velocity, low-recoil performance in a compact pistol-format AR-pattern platform
• 6.5″ barrel keeps the overall package compact while maintaining the ballistic performance of the 5.7x28mm cartridge
• 32-round magazine capacity supports extended range sessions and reduces reload frequency during training or defensive use
• MK4 lower receiver geometry accepts standard AR-15-compatible lower parts kits and accessories, preserving familiar AR controls
• Tungsten Cerakote finish provides corrosion resistance and a durable surface for regular handling and field use
• Pistol configuration allows for a shorter overall length compared to rifle or SBR variants, suitable for home defense and range applications

Compliance & Legal Notes

• FFL Transfer Required: This firearm must ship to a licensed Federal Firearms Licensee (FFL) and will be transferred to the buyer in accordance with federal, state, and local law.
• Shipping Restrictions Apply: Some jurisdictions restrict or prohibit certain firearms or features. Orders may be modified or canceled if delivery is not legally permitted.
• Buyer Responsibility: The buyer is responsible for ensuring this firearm is legal to purchase, possess, and transfer in their jurisdiction.

Box / Package Contains

• One factory-new CMMG Dissent MK4 pistol in 5.7x28mm – Tungsten
• One 32-round magazine
• Manufacturer lock
• Owner’s manual