Took my Spider paintball gun with a long barrel. Fitted a 4.5mm barrel inside the .68 barrel. Will be looking to use the small air bottels on the machine. Current mount rings to be replaced for higher rings, the scope in the way of cocking the marker. Still need to decide if I am going to add a fore hand grip. "custom" pipe stock, actually comfortable, will add thin rubber cover. Cant wait to shoot tomorrow.