I am a revolver guy and mostly unfamiliar/confused with all the S&W current semi-autos. I gather this is a 9mm M&P (older first model ?) I really liked the feel of it and figured a Hi Cap 9mm might be a nice purchase. I was picking up my Heavy Duty .38 revolver at my FFL today and had them throw this into the system to also come home with me. I'm just looking for anything interesting or I might want to know from those of you to whom these are second nature.