In "Call Of Duty: Zombies", which weapon does NOT deal any damage?

The 31-79 JGb215 weapon in Call of Duty Zombies does not deal any damage because it is designed as a shrink ray gun that shrinks zombies into miniaturized versions temporarily, rendering them harmless and unable to attack the player. It is primarily used as a defensive tool rather than an offensive weapon, serving as a way to buy time or escape dangerous situations without directly eliminating enemies.