An arrangement comprising: - a payload; - an elongated body comprising a compartment configured to store and eject the payload, wherein - an aerodynamic surface of the elongated body is provided with a launch opening comprising a guideway extending from the compartment; - the guideway is coupled to or associated with a payload holding area of an end section of the compartment, which payload holding area is configured to hold the payload to be launched in an eject position in the compartment; - a sliding portion of the payload is configured to slide along the guideway and through the launch opening upon ejection, - the extension of the guideway inclines with an acute angle (α) relative the normal to the centre line of the elongated body, - the plane of the payload holding area and the plane of the guideway exhibit a relative angle corresponding to the acute angle (α), which relative angle forms a corner point; - the payload holding area is configured with an ejection mechanism configured to eject the payload along the payload holding area in a direction toward the launch opening for providing a motion of the payload over the corner point assuring that a first portion of the payload is exposed to the airflow before a second portion of the payload is exposed; - the sliding portion is on an opposite side of the payload comprising the first portion and the second portion; characterized by - the acute angle (α) is determined such that, during use of the arrangement, airflow flowing over the aerodynamic surface will apply an eject force on the first portion of the payload being ejected, wherein the second portion of the payload is exposed to the airflow after the first portion has been exposed to the airflow, so that the payload will flip around for releasing a countermeasure element from the payload by means of the airflow. - a payload; - an elongated body comprising a compartment configured to store and eject the payload, wherein - an aerodynamic surface of the elongated body is provided with a launch opening comprising a guideway extending from the compartment; - the guideway is coupled to or associated with a payload holding area of an end section of the compartment, which payload holding area is configured to hold the payload to be launched in an eject position in the compartment; - a sliding portion of the payload is configured to slide along the guideway and through the launch opening upon ejection, - the extension of the guideway inclines with an acute angle (α) relative the normal to the centre line of the elongated body, - the plane of the payload holding area and the plane of the guideway exhibit a relative angle corresponding to the acute angle (α), which relative angle forms a corner point; - the payload holding area is configured with an ejection mechanism configured to eject the payload along the payload holding area in a direction toward the launch opening for providing a motion of the payload over the corner point assuring that a first portion of the payload is exposed to the airflow before a second portion of the payload is exposed; - the sliding portion is on an opposite side of the payload comprising the first portion and the second portion; characterized by - the acute angle (α) is determined such that, during use of the arrangement, airflow flowing over the aerodynamic surface will apply an eject force on the first portion of the payload being ejected, wherein the second portion of the payload is exposed to the airflow after the first portion has been exposed to the airflow, so that the payload will flip around for releasing a countermeasure element from the payload by means of the airflow.