Call of Duty Wiki
Call of Duty Wiki
The subject of this article appears in Call of Duty: Modern Warfare (2019)
"Reduce the charge time of field upgrades by 40%."
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Tune Up is a Tier 3 perk in Call of Duty: Modern Warfare. It increases the rate at which Field Upgrades are earned by 40%, and is unlocked by default. In Warzone, it reduces revive time by 25%.