Prebuilt supergun from Great Western Trading. From the get go this supergun is desgined to be a bit more "user friendly" than your average home made kit.
The unit is built out of heavy duty materials with the aim of concealing all sensitive wires and such to protect them from damage. The microswitches for the controls are connected via clips and thus requires no soldiering. Presently availible in three different models, ranging from $295 to $395.
Official site: http://www.gwtrading.com/hga.shtml