Basically a laser gun, but it's more like a flash-light, and has a cool "Beeooorrrww" or "Wollawollawolla" sound effect. They're pretty sweet.

The Ray Gun is the best gun to get in the Nazi Zombie game mode in Call of Duty: Wolrd At War

It is a one shot kill, however obtaining it can be tricky.

the greatest cause of celebration during an intense game of nazi zombies. screaming and shouting and occasionally even battle cries often follow a player stumbling across the rare but life-changing weapon in the mystery box. prolongs zombie pwning time but nazi zombies is still and will always remain an un-winnable game mode.