The gun takes 8 pumps for max distance and runs on 100 psi
The range of it is 12 metres. It is a compact artilley device (the name CAD)

The gun (It uses an air pump)

The shrader valve

The ball valve

The valve closed

The valve open

The water left behind after a shot (the buldge on the left is from a seris of shark shots)
I made a decent video of It firing
http://s692.photobucket.com/albums/vv28 ... 07_MVI.flv
*edit
I noticed that the pictures may be cut out a bit. To see full size just go to my photobucket account. http://s692.photobucket.com/albums/vv283/captianfear/
Thanks,