https://wccftech.com/black-ops-4-patch-uncapped-blackout/

The very first Call of Duty: Blacks Ops 4 patch has been rolled out over the weekend, and it appears that the latest update has uncapped the framerate in the game’s Battle Royale Blackout mode on PC.

The game already supported uncapped framerates on PC for all modes except Blackout, but as reported by DSOGaming, the latest patch appears to have also removed the 120FPS cap on PC.