Epic loves a good secret, or at least doesn't tell us everything that's added to Fortnite. Although many new weapons were added at the start of Season 2, it seems that a legendary shotgun has also been added to the game. The weapon is already causing a stir, as it can deal 100 damage on a body shot , which means you can hit someone without a shield. He will do 250 damage with a headshot.
All of the new weapons we added with Season 2 do a lot of damage, but a single shot to take out a player would cause a lot of in-game waves. The legendary shotgun is not yet available in battle royale mode, and you can only find it in Battle Labs. At the moment, it's an incredibly rare spawn. We've spent hours opening chests in Battle Labs and haven't let it down. If you want to try it, you will need a lot of time and patience. You can increase your chances of finding it if you set the Loot option in the Battle Lab to Sniper Shootout, as this will cause all weapons to drop a variation of a Sniper Rifle.
After that, just search high and low and open every chest you can find.
We have lots of other helpful guides that you might find helpful. How to get Deadpool, where to find Deadpool's letter to Epic Games, how to deal damage to henchmen, and how to customize your new Maya skin that you can get with the Battle Pass.