sure, gennerally there are 30lb co2 tanks and 50lb tanks that you can fill from, you will also need a fill station and instruction from a air smith on how to use it, so it is fairly expensive to own, but what a lot of people do it buy a fill station and then rent a co2 tank for the day from a welding shop or another place that will do it (Scuba shops sometimes, propane stations, you just have to do a little searching) for a 50lb tank i think it was around $30-$40 so have everyone pitch in a few bucks and you are covered for the day