What remedial action is needed for a double feed stoppage in the M500A1 service shotgun?

In the context of handling a double feed stoppage with the M500A1 service shotgun, the correct course of action is to push the bottom round into the magazine tube. A double feed occurs when two rounds are attempting to enter the chamber or when a round is stuck behind another round that is already in the chamber. By pushing the bottom round into the magazine tube, you can relieve the obstruction caused by the double feed, resetting the firearm to a state where it can function correctly again.

When addressing a double feed, it's essential to clear the action of the shotgun before this step, ensuring that the firearm is safe and that the action is not impeded by any further obstructions. Pushing the bottom round into the magazine tube effectively allows the action to reset and prepares the shotgun to cycle properly again when attempting to chamber a new round. This process is specifically designed to remedy a double feed situation effectively.