It cost 1000yen, so about $14, and fires three foam darts. Using the arrow keys you can rotate it through 360 degrees, up and down and then fire using the space bar. Bloody powerful too, can easily fire from one side of my lab to the other which is about the same width as Memphis.
Here's a photo of it, and I'll try and get a video up later.
Yes I'll go back and see if they have any more, Memphis needs one of these. Also if anyone else would be interested add your name to the discussion page and I'll see if I can send some back (Postage might be expensive).