WGP (the maker of the infamous autococker) made a single tube bodied pump for a brief period. They called it a Ranger. The ranger name was used years later when WGP bought out the bruizer line of spyder-like blow back markers and sold them under the WGP name.
This thind is built like a tank. No one will ever claim it to be a light weight pump, but it will take a kicking and keep on ticking..
enjoy,
Kmac