It is a one-shot, one-kill weapon until round 15, and comes with plenty of ammo. The Raygun will take two shots to kill up to round 20, and 3 shots to kill up to round 30.
How to find
The Raygun can be found in the Mystery Box
-The Raygun is a Wonder Weapon, along with the Chicken Gun (Unconfirmed) and the Wonder Sword.