This rifle-like metallic weapon with a forked barrel was built by Doctor Doom. Instead of shooting slugs, the gun shoots an energy bolt to paralize enemies within an energy shell. Impacted victims -as the machine can hit several people at once- become prisoners, frozen in their positions and requiring no air or food, with their body functions interrupted - but they can perceive their surrounding and attempt to release themselves only once. The process takes a few seconds after the hit to be completely effective; should the shooter stop the stream before that time, the prisoners would release themselves with the energy dissipating. Otherwise, the shell will keep the prisoners immobile permanently, until it is removed by manipulating the rifle (specifically reversing the gun's polarity) or destroying it. The hull theoretically could even paralyze the Hulk. Sometimes, Doctor Doom outfits one of his Servo-Guards -only one member of a unit- with an operative unit of this device.
Doctor Doom offered an operational model of this gun to his ally Sub-Mariner so that they could attack together the Hydrobase research center, that had been captured by the Sub-Mariner's enemies Attuma; Doctor Dorcas and Tiger Shark. Doom's plan included the Sub-Mariner paralyzing these enemies while Doom himself confronted Attuma's numerous troops; then, once the Sub-Mariner had succeeded, he could join Doom. However, once the Sub-Mariner shot his enemies, he found that this defenselessness was unsatisfactory and, for purposes of avenging properly, the Sub-Mariner destroyed the rifle, releasing his foes so that he could confront them fairly. While the Sub-Mariner succeeded, he took more time than expected and put in danger both Doom and Attuma's prisoners.