Tennis racket bag?
Available in bright colors, sports logo's etc. Pretty stealthy for some IMO. Nothing that even implies tactical or gun, unless you're an old, overweight, greybeard like me. Then the tennis thing might look suspicious.
Musical instrument cases might be stealthy, but get stolen probably more than guns.
gunzo, I looked at those. But, there didn't seem to be much in the way of secondary storage.
