Many of my partners carry the M&P9 in Crossbreed holsters...I have a Desantis holster that is a Crossbreed knockoff and I like it. I also really like my Galco Triton IWB holster...It's kydex and pretty thin, carries the pistol nice and low on the belt for concealment and comfort, and retains the pistol well.

My main carry pistol (for now...I'll probably start carrying my full size most of the time this week once I get my new M&P9) is an M&P9C...I carry it in a Remora holster and I think the full size would also work well in one...I'll probably pick up another for the full size just to test out.