Yup, we use markers, the first piece of kit made to fire a paintball was called a "marker" not a gun, and not for PC reasons, it was used to "mark" trees hence "marker". But, if you want to call them guns, go ahead, doesn't bother me. As far as I'm concerned they have always been markers, never made a conscious decision to call them that. Doesn't really seem worth arguing about really. The term gun might get us some bad press, put the sport in a bad light and generally hurt our image. The term marker has no real negatives, unless saying the extra three letters is a real hardship. Plus, I don't know about you, but saying it's a gun when it isn't just feels a bit pathetic.