The Mountable Charging Station Paintball CO2 Fill Device is compatible with every CoolFire Trainer Barrel and works with the 20oz Paintball CO2 Tank. This CO2 Fill Device can be mounted onto a surface to allow for quick re-filling of the CoolFire Trainer Barrel.
Definitely the way to go! I initially bought the soda maker CO2 refill, but the stores will not refill these locally. You need to send them in/exchange them. I can get the paintball CO2 cans refilled for $4 at a local sporting goods store. I am very happy I switched