I live in a nice suburb.
I work at the largest jail/justice complex in the south. It's in Memphis-one of the murder and crime capitals of the country, thank you. I have seen tanks on Main Street (1968), and martial law/National Guard troops several times during riots. Gang thugs are everywhere. I have experienced things you can't imagine. I am COMPLETELY prepared for most anything. I simply carry a .32 as my primary gun. I keep others handy at all times.
Your gun customers, like you, will have to figure it out for themselves. Good equipment makes carrying a big gun more comfortable, but not as comfortable as my .32.