The Air System (commonly shortened to just AS) theme is a line of N-Strike blasters. They are one of the oldest N-Strike lines, with it being a direct replacement to the old Airjet Power and Airjet Power Plus series. Even the Rapid Fire AS-20 was previously an Airjet Power series blaster. Each blaster has to be pumped a certain amount of times before it can be fired. There was also a sub-line of this theme called Air System Vessel, of which only one blaster in a part of.