Abstract: A stun gun having an electrically insulated protuberance that extends to a height above the line between the vertical terminations of the exposed electrical target contacts. Before the weapon's target probes can be brought in contact with the target, the insulative protuberance compresses the target's muscle. This action shortens the length of the muscle while increasing the area of tissue involved in a subsequent shocking discharge. This, in turn, increases the likelihood of a sustained involuntary flexing or extending contraction of the muscle. A rectangular ammunition bay may be placed in the weapon with a portion of one partially exposed probe touching the ammunition's negative contact and a portion of the other partially exposed probe touching the ammunition's positive contact. In the event of a ballistic deployment failure, without the addition of any circuitry, the weapon can still act as a manual contact weapon.