CMMG Dissent MK4 Upper .300 AAC Blackout 10.5 Barrel
Click to see full view
CMMG
Overview
The CMMG Dissent MK4 Upper is a complete upper receiver chambered in .300 AAC Blackout with a 10.5-inch barrel, making it an ideal choice for compact builds that require versatility in ammunition choices. This upper is designed to deliver reliable performance in both suppressed and unsuppressed configurations, allowing builders to easily adapt to various shooting scenarios. It commonly appears in short-barreled rifle (SBR) builds where mobility and power are crucial.
Specifications
Available Merchants(4)
Prices checked
Stock Alert
Log in to get notified when this product is back in stock.
August 2026 on GunPartPicker
CMMG Dissent MK4 Upper .300 AAC Blackout 10.5 Barrel ranked #291 of the 690 upper receivers builders added on GunPartPicker in August 2026. Builders on GunPartPicker first added it to a build in April 2026.
Today none of the 4 retailers we track has it in stock right now. Listed prices start at $1,134.99 at Palmetto State Armory for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 31 retailers
Not sure which upper receiver to pick?
We ranked every upper receiver by how often it shows up in real builds on GunPartPicker.
Read the guide: Most Popular AR-15 Upper Receivers →Frequently Built With
Popular alongside upper receivers on GunPartPicker
Aero Precision M4E1 Complete Lower Receiver W/MOE SL Grip & SL-S Carbine Stock
Aero Precision AR-15 Breach Charging Handle Ambidextrous Small Levers
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Bravo Company M16 Bolt Carrier Group Black
Magpul AFG-2 Angled Fore Grip - Black
Magpul AR-15 MOE Stock Collapsible Mil-Spec Black
No reviews yet. Be the first to review this product!