I have never noticed someone carrying a smaller single stack gun, or even a revolver. I have been surprised a few times when someone mentioned they were carrying and then showed me. On the other hand, I see people carrying larger firearms pretty often. Just last week at sams club I noticed someone printing what I took to be a full size XD and not five minutes later noticed someone with a 1911. I guess that is a not single stack gun, but it is sure not small!