...? Yes they do... :P They're giant in comparison with his body size. :P
But, seriously, do you realize how long ago I posted that, and how frivolous it is to continue?
(It is ridiculous to continue, but you can blame wikia with their "recent forum discussion" for that.)
Most minifigure accessories are overly large. They themselves are disproportionate. The carrots are about half their height and apples are the side of their head. I don't think that the size of a weapon on an alien world matters where we know nothing about their physiology (other than what is obvious to see.)