Originally Posted by Left Coast DJ
Or you can always buy a small 2.5 lb. CGA 320 tank rather than a 20 Oz. paintball one. I don't think the size is that much different.
That is true, that the size difference wouldn't be huge, but it is still noticeable. Also, for some, filling paintball tanks is much easier than filling the traditional CO2 tanks. Just walk into any commercial sports store and you're done filling the tank.