The SA-17 is designed to be used on the battlefield, but sometimes 12-gram cartridges are not the best choice. BT Paintball offers the SA-17 Bottomline Kit to offer larger air sources for your pistol. A dummy CO2 is inserted into the 12-gram retainer and the stainless braided hoseleads to an ASA mounted on the grip frame. With the Bottomline Kit, the SA-17 will work well with both CO2 and High Pressure Air sources.  Increase your effectiveness by removing the need to change CO2 cartridges and stay in the game longer with BT Paintball.