A water gun comprising at least: pressure tank, a nozzle, a tube and valve with a valve conduit, wherein - the pressure tank has an outlet being connected to an inlet of the tube, - the tube has an outlet being connected to an inlet port of the valve conduit, and - an outlet port of the valve conduit is in fluid communication with the nozzle, - the valve comprises a valve drive configured for shifting a valve stem from its closed position into its open position and/or back from its open position into its closed position, characterized in that - the valve drive drives a body being movably supported and configured to be shifted by the valve drive at least essentially parallel, i.e. parallel within ±15°, to the longitudinal axis defined by the stem from a start position via an intermediate position to an end position, wherein the body and the valve stem are coupled via a position selective coupling, wherein the position selective coupling is configured to selectively couple the body to the valve stem when the body is at the intermediate position while the body moves from the start position to the end position, - the position selective coupling comprises a movably supported follower, - a linear bearing movably couples the body and the follower, wherein the linear bearing enables the body and the follower to translate relative to each other, wherein the translation is parallel to the longitudinal axis, - an abutment (54, 55) being defined by a surface of the follower or the body is configured to limit the axial movement of the body relative to the follower, when the body moves from its start position to an intermediate position and/or from the body's end position to the body's start position, - the follower is attached to or integrally formed with the valve stem. - the pressure tank has an outlet being connected to an inlet of the tube, - the tube has an outlet being connected to an inlet port of the valve conduit, and - an outlet port of the valve conduit is in fluid communication with the nozzle, - the valve comprises a valve drive configured for shifting a valve stem from its closed position into its open position and/or back from its open position into its closed position, - the valve drive drives a body being movably supported and configured to be shifted by the valve drive at least essentially parallel, i.e. parallel within ±15°, to the longitudinal axis defined by the stem from a start position via an intermediate position to an end position, wherein the body and the valve stem are coupled via a position selective coupling, wherein the position selective coupling is configured to selectively couple the body to the valve stem when the body is at the intermediate position while the body moves from the start position to the end position, - the position selective coupling comprises a movably supported follower, - a linear bearing movably couples the body and the follower, wherein the linear bearing enables the body and the follower to translate relative to each other, wherein the translation is parallel to the longitudinal axis, - an abutment (54, 55) being defined by a surface of the follower or the body is configured to limit the axial movement of the body relative to the follower, when the body moves from its start position to an intermediate position and/or from the body's end position to the body's start position, - the follower is attached to or integrally formed with the valve stem.