The Ion is an electropneumatic paintball marker manufactured by Smart Parts. At the time of its release, the Ion was the first fully electropneumatic marker aimed at entry-level players, at a price point similar to Spyders and other mechanical blowbacks. The Ion has generally been credited with making high-rate-of-fire electropneumatic markers generally available, at a time when electropneumatic markers were considered out of reach of most casual or budget players.