I figured most of the time they won't even see it.
Yes, I recommend micro 9s those are really concealable.
I have a feeling anyone who sees it on me will get offended or scared, maybe not though, I guess we will see.
Just don't make big deal about it and you'll be fine, as long as you are in a place that you are legally allowed to be it shouldn't be an issue. Don't brandish or threaten people, but that goes without saying.