Abstract: The present invention comprises an extension tube that attaches to the bore end of a water jet producing device that is used to render safe improvised explosive devices by disrupting the firing train of said devices. The present invention comprises an extension tube having a sudden enlargement of cross section, that may be formed by adjusting the dimensions of the interior diameter of the extension tube, at the point of attachment, and a series of apertures in the attachment tube. The extension tube provides a more uniform jet of water with more focused energy by containing the jet until breech pressures are vented. Better control of the water jet will be maintained during firing operations. Further, more energy may be put into the water jet to accomplish specific tasks.

Abstract: The present invention is a robotic arm with a plurality of telescoping tubes coupled rotatably to a plurality of rings through apertures in the rings. A plurality of tendons pass through the telescoping tubes. Tension is applied to the plurality of tendons to move the telescoping tubes. A controller is employed to direct the amount of tension applied whereby the robotic arm moves as directed.