How to get & upgrade your Tesla weapon with an Elemental Effect:
The 4 Elemental Upgrades can be obtained after turning on the power on The Final Reich and unlocking the Pack-A-Punch Machine. They are always in the same spot.
The video below shows you where to find the Elemental Upgrades in The Final Reich.
How to build the Tesla Gun:
Tesla Gun “Midnight” Upgrade Tutorial:
Tesla Gun “Reaper” Upgrade Tutorial:
Tesla Gun “Hurricane” Upgrade Tutorial:
Tesla Gun “Bloodthirst” Upgrade Tutorial: