Abstract: A replacement bolt action assembly useful for converting a gas operated paintball marker gun having an open bolt type action to a closed bolt type action is provided. The open bolt type action includes a combination open bolt and hammer assembly releaseably containable in the marker gun body, an actuator (trigger) assembly disposable in the marker gun frame in mechanical communication with the bolt and hammer assembly, for releaseably holding the bolt and hammer assembly in a cocked configuration; and a pressure control assembly in mechanical communication with the actuator assembly and in gas flow communication with the bolt and hammer assembly. The present invention can be provided as a kit for converting or replacing the actions of certain existing paintball marker guns to close bolt type actions without having to modify the structure of the existing gun's receiver or marker body.

Abstract: A replacement bolt action assembly useful for converting a gas operated paintball marker gun having an open bolt type action to a closed bolt type action is provided. The open bolt type action includes a combination open bolt and hammer assembly releaseably containable in the marker gun body, an actuator (trigger) assembly disposable in the marker gun frame in mechanical communication with the bolt and hammer assembly, for releaseably holding the bolt and hammer assembly in a cocked configuration; and a pressure control assembly in mechanical communication with the actuator assembly and in gas flow communication with the bolt and hammer assembly. The present invention can be provided as a kit for converting or replacing the actions of certain existing paintball marker guns to close bolt type actions without having to modify the structure of the existing gun's receiver or marker body.