Stunner (weapon)

A Stunner is a general term for a science fiction weapon that is designed to temporarily impair the motor and/or cognitive functions of a living being, usually by rendering it unconscious, but otherwise unharmed.

The most famous examples of this kind of weapon include:
*Phasers in the "Star Trek" franchise which can be set to stun an opponent with variable severity.
*Stunners in the Vorkosigan Saga by Lois McMaster Bujold which causes a temporary reduction in nerve activity within a radius of the impact site.
*Stunners in the "Solar Queen" series by Andre Norton which disrupt the motor function, although leaving the shot person conscious.
*The Wraith of Stargate Atlantis use stunners to capture humans alive, in order to feed on their life energy.
*Also in Stargate Atlantis, Ronon Dex's personal energy pistol can be set to two settings: stun and kill.
*Stargate SG-1's Zats are not true stunners; although one shot is sufficient to stun, a second burst is fatal. The single shot from a Zat does not necessarily incapacitate, as strong or prepared enough targets can shrug off the effects in several seconds (the second shot is still fatal).
*In Battlefield Earth, Psychlo weapons are basically two-in-one, with one barrel firing destructive shots and the other emitting green pulse that stuns and knock the target back.