One Inch Punch

The Thunderfist is a melee weapon in the Zombies map Origins. It allows the player to punch zombies with a powerful force, causing zombies to blown away, similarly to the Thundergun from Call of Duty: Black Ops. It can kill a zombie with a single melee attack until round 20s.

In order to obtain it, the player must charge up four chests that are located around the map. Once completed, players can go to a Ritual of the Ancients station and they will be rewarded with the Thunderfists.