Abstract: An assembly for selectively exposing a firing chamber to a motive gas is provided by using a solenoid valve to expose selected portions of a tubular sliding valve to a lower pressure control gas. The tubular sliding valve includes a through passage for transfer of the projectile from a breech to the firing chamber. An on board controller can dictate actuation of the solenoid valve in accordance with a remaining pressure of the motive gas and user input.

Abstract: An adapter assembly for releasably interconnecting a pressurized bottle with a paintball marker, wherein the adapter assembly includes a piercing pin moveable between retracted position and an extended position. The adapter assembly includes an internally threaded female socket for releasably engaging the pressurized bottle, and an externally threaded male head for releasably engaging a corresponding female connector on the paintball marker. The spacing of the threaded connections and the travel of the piercing pin are selected such that the piercing pin punctures a frangible seal of the pressurized bottle subsequent to fluid interconnection of both the pressurized bottle and the paintball marker with the adapter assembly.