Just a quick note, I taped the whole thing with electrical tape because it holds together better this way. This gun is mostly lego, though other things are also needed, such as rubber bands, lasers, tape and wire.
You can try to make this, or take suggestions from it, whatever you want. As I said, I'm always open to suggestions and I'd love to see your creations too. So post, post, post away! Ratings are always nice, too, so I'd love it if you'd rate this for me.