agreed. smart parts ion with a few upgrades and your away. definatley get air if your playing tournament paintball/ sup air. If your playing woodland, check what type of gas your local site uses.good marker for a newbie smart parts ion can keep up with most markers and it is pretty cheap
by attatching the gas bottle to a scuba tank which has had air compressed into it. There is a fill nipple on the side of the bottle. Attatch it and pull the leaver to release air into the bottle. There are different types of filling systems and people at the sites will tell you.how are the air tanks filled?