I always liked the Ratslayer's look, animation and sounds, but it was too weak.
So i made it Strong! 150 Damage!

Replaces the Ratslayer weapon.
Basically the Ratslayer with the stats of AntiMaterial rifle, but a little better.
Now you can kill Deathclaws with it!

Location:
The original location of Ratslayer...
...inside the Broc Flower Cave, below a desk in the makeshift laboratory on the upper level. It may be quite hard to find, as there are lots of giant rats in this room. With the Wild Wasteland trait, the area around the Ratslayer will have several giant rats called "rodents of unusual size".

Or you can add it through console command: Player.additem e5b17 1