PUBG writes: Prepare for Update #5, coming to live servers on June 27! This update features our new progression system called Weapon Mastery, Controller Preset Type C, the new Auto Equip feature, loot rebalancing on Erangel and Vikendi, and much more. Dive into the patch notes below!
Source: N4G PC Update #5 Patch Notes – PLAYERUNKNOWN'S BATTLEGROUNDS