|The following is based on Fallout Tactics and some details might contradict canon.|
The Spasm Gun is a nasty little weapon that over-stimulates the synapses of the target, causing sensory overload and jerking motions. Some memory loss, brain damage, hemorrhaging and motor-control deterioration accompanies the light stunning effect.”
The Spasm Gun has a chance of inflicting a stun effect on its targets.
Can be used only in multiplayer mode.