A CO2 tank for paintball guns can be filled at several locations, including paintball stores, paintball fields or sporting goods stores. Single-use tanks are also available for purchase. For convenience's sake, many consumers buy fill stations or larger CO2 tanks so that they can refill individual smaller tanks at home.
One sporting goods store that provides CO2 gas tank refill services is Dick's Sporting Goods. As of 2014, a tank refill at the store costs between $2.99 and $4.49, depending on the tank's size. A free refill is also available with the purchase of a brand new CO2 tank. Tanks that can be refilled at this location must be between 9 ounces and 24 ounces in size.