A new feature has been added in #FortniteSeason3 to recharge your 50 overshield upon an elimination as well as the previous way to recharge overtime! I'm uncertain if this is live right now or still in the works though.
The following items have been vaulted in season 3:
• MK-Seven Assault Rifle
• Drum Shotgun
• Thermal Scoped AR
• LMG
• Rift-To-Go
• Balloons
• Thermal Flopper