- For a simillar attachment for the Cordite in Call of Duty: Black Ops 4, see Belt-Feed.
- "Upgrades the weapon to Overheated Fire Mode. Deducts no ammo when shooting by controlling the temperature of the barrel to continuously fire."
- — Gunsmith Description
The Cooling Compressor Barrel is a "Signature Attachment" for the RPD in Call of Duty: Mobile that was added in June 2022 as part of the Season 5: Tropical Vision update.
It allows the RPD to fire an infinite amount of bullets, but possesses an overheating mechanic and slows down the movement speed. However, it increases range, recoil control, and flinch resistance, while also worsening ADS bullet spread.
When equipped with the barrel, the weapon will be able to fire continuously for 9.05 seconds before overheating.