Exemplary embodiments are disclosed of paintball makers. In an exemplary embodiment, a paintball marker generally includes a housing including a wall defining a chamber having an axis and an open end. A valve assembly is within the chamber. The valve assembly may be coaxial with the chamber. The valve assembly may be configured for rotation about the axis of the chamber. The valve assembly may be configured to seal compressed gas while at rest and configured to seal and release compressed gas while in motion. Additionally, or alternatively, the revolving valve assembly may have a start position and a stop position which is located one revolution from initial movement out of the start position.