During a function check of the M240B, if you pull the cocking handle to the rear and then return it forward, what should happen next when the safety is set to "S"?

When conducting a function check of the M240B and the cocking handle is pulled to the rear and then returned forward with the safety set to "S," the correct outcome is that nothing should happen. This is because when the safety is engaged (set to "S"), it serves as a mechanism to prevent the weapon from firing, regardless of the position of the action or the cocking handle.

In this scenario, withdrawing the cocking handle and releasing it does not cycle the weapon to a ready state for firing since the safety is actively preventing any discharge. This behavior is designed for safety, ensuring that the weapon cannot function while it is in the safe mode, which is crucial in preventing accidental discharges during handling or checks. Therefore, the fact that no action occurs when the safety is engaged confirms that the safety mechanism is functioning properly.