The weapons were designed primarily by Degra, a Xindi-Primate scientist and member of the Xindi Council, and constructed by the Aquatics. Most of the weapons' components were built by the Xindi, but at least one component came from the year 2573, supplied to the Xindi by the Sphere-Builders. (ENT: "The Expanse") Another key component of the weapons was the mineral kemocite, which was provided by a refining facility where Gralik Durr worked. (ENT: "The Shipment")