Fair enough -- in fact, I was considering making the left mouse button the firing one, but some issues revealed that not clicks were registered, particularly when the mouse was moving at the same time as the app (this could be a consequence of me using Java +JavaSwing). Also, the weapons point is noted, and originally, I was going to have a '1 2 3' system, but I was wondering if that would have been just not good design. However, using RMB is a really good suggestion that I hadn't thought of, so thanks!