Finish the quest Power Play and restore power to the Nuka World (Start doing quests for Shank if you haven’t done so already, you will eventually end up restoring power to the Nuka World amusement park)Ģ. Here is how you can upgrade the Thirst Zapper for such powerful effects. After firing a shot you pour some Nuka Cola into it and fire again for a concentrated but deadly explosion. The gun has also the coolest reloading animation we have ever seen. Via youtube Location of the upgrade for the gun After defeating Overboss Colter you can spike your gun with some Nuka Cola upgrades to make it really powerful. You will then use the gun to lower the electricity shield on him so that he becomes vulnerable to your actual weapons. One of those weapons will be the Thirst Zapper. Once inside the room, you’ll find a number of lockers filled with various types of weapons. Talk to Gage via the Intercom and he’ll let you pass the door. In the first quest when you get to the Nuka World, after you complete the gauntlet, you will see a guy named Gage in a Power Suit armor. If you accidentally sell the weapon because you were unaware of its sheer power, you can find the weapon again in the Nuka Cade. You can find the weapon right in the beginning of the Nuka World DLC. via gameinformer Fallout 4 Nuka World Weapons Guide: Location of Thirst Zapper

This is especially useful when you are playing the game at the Survival Mode difficulty. The weapon has the best ammo efficiency than any other weapon in Fallout 4.

When fully upgraded, the Thirst Zapper can become quite powerful. This new ammo type is called the Weaponized Nuka Cola. This is a very powerful gun that uses a new ammo type. If you’ve watched a lot of the promotional videos for Nuka World, you’ll recall this weapon in the hands of the Nuka World girl when she poses with it. We will also tell you the location of all its upgrades. Our Fallout 4 Nuka World Weapons Guide will tell you the location of the Thirst Zapper.