Thundergun

The Thundergun is a Wonder Weapon featured in Zombies. It appears on the zombie maps Kino der Toten, Ascension, and the Black Ops edition of Nacht der Untoten.

Overview
The Thundergun is a large, cannon-shaped weapon that fires blasts of incredibly strong compressed air. It has no iron sights, meaning it must be fired from the hip. It is able to kill large numbers of zombies with a single shot, sending them flying backwards or up. Those who are not killed by the blast are thrown backwards and will remain on the ground for a few seconds before getting back up. The Thundergun holds two rounds in its magazine, and has twelve reserve rounds. The Thundergun can only be reloaded when all shots have been fired. The Thundergun is most important during the later rounds as it is useful for clearing large groups of zombies in order to reach a downed teammate or make an escape. It is extremely useful when swarmed because it will easily kill a large group of zombies in one shot.