I was a little underwhelmed with the miniature weapon selection on the site, so I spent a couple of hours working on this. Load the magazine up to ten shots, and it will fire one after another. Tips: Assemble with computer hard drive screws (you know, the smaller threaded ones)

Holes, for the most part, are all 10mm apart, very easy to make further attachments.

I really don't know why I have to explain it to everyone I hand this thing to, but here's how you fire it (properly).

1. Pinch your fingers around the firing pin
2. Pull the pin back quickly as to allow only a single pellet to enter the chamber. Doing this slowly (like scared you're gunna break it slowly) will sometimes either cause it to jam, or for some of the pellets to fall out.
3. You don't have to but to get the most powerful shot, pull the pin as far back as you can without it falling out of the chamber. (no really, someone pulled it back just enough for the pellet to load, and then complained that the shot didn't go anywhere)