Many preppers will be seriously considering an evacuation to a secondary home, Bug Out Location, or other hideout in the event of a SHTF scenario. One assumes then some kind of transportation vehicle along with weapons has to be in the mix.
Gun cases are made to protect guns. Guns are tools, fine tools. They deserve to be cared for so they can be expected to perform to their design potential. Guns need regular maintenance, cleaning, repair, and proper storage. Storage implies both during the time of use and afterwards.