The gun industry's "Trump slump" story has been breathlessly and endlessly reported, which makes it seem as though an investor should avoid any company in the space at all costs. If people aren't buying guns, manufacturers can't profit, and their stocks will tank.While there is indeed a slowdown under way and the stocks of gunmakers have borne the brunt of it, the industry is inherently cyclical and the current downtrend is nowhere near as apocalyptic as has been portrayed.