(I'm not sure whether I should put this here or somewhere else, but... meh)
I have a theory that all the bullets shot out of our Knights' guns are made from Energy, most likely a form much more unstable than the Energy that we use as currency. :D
I noticed that most of the bullets from guns don't look completely solid. When we think of Energy, we don't think of something solid.
Another thing is that Energy is basically the same as Sparks of Life, which obviously have a connection to electricity.
Electricity emits heat, and maybe this causes the guns to overheat. Maybe when we reload, we're just letting the guns cool down.
The guns overheating would explain why we don't need to reload if we shoot slowly enough. The gun cools down by itself.
Now where would the Energy come from?
Maybe the gun itself creates the Energy that it fires. If it creates too much Energy to shoot in a certain amount of time, it overheats. Also, making the Energy turn solid could make the guns overheat quicker, explaining why the Autogun and Magnus lines of weapons have 2-shot clips.
And we can't use the Energy from the guns for buying stuff, because it's too volatile. :D
(I wonder if this is what the Game Masters meant to do with the guns. :D )
seeing your name was intriguing. And I like the vivid imagination you have.