The Thundergun holds two rounds in its magazine, and has 12 rounds in reserve. 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. It is able to kill large numbers of zombies with a single shot, sending them flying backwards or up. It has no iron sights, meaning it must be fired from the hip (although when observed in third person, it is held on the shoulder). The Thundergun is a large, cannon-shaped weapon that fires blasts of incredibly strong compressed air.