https://www.pcgamer.com/pubg-adds-bullet-penetration-system-and-new-dynamic-weather/

If hands blocked bullets in PUBG, I might have fared better in my quest for a bare-fisted chicken dinner. They don't, obviously, but PlayerUnknown's Battlegrounds' long-awaited bullet penetration system now targets forearms. Likewise, dynamic weather is coming to Erangel and Miramar. 

Both come with PUBG's PC 1.0 Update #19, the former of which allows bullets to penetrate targets' bodies "following its ballistic curve."