Abstract: A paintball gun system in which the compressed gas tank coupled to the paintball ejection system is mounted to a lower side surface of a paintball gun such that the compressed gas tank may be moved relative to the paintball gun. An attachment member which couples the two includes a first part having a surface mounted to a lower side surface of the paintball gun and a second part having a surface mounted to an upper side surface of the compressed gas supply system. To reposition the compressed gas tank, the second part of the attachment member is repositioned relative to the first part. By moving the paintball gun relative to the compressed gas supply system, the vertical profile of the paintball gun system is reduced.