I own a full size 9mm m&p and have recently been looking at getting a ccw. I love my full size and carry it OWB almost every day. I am a heavier set fellow so a full size conceal may be a bit hard. Most of the guys at the gun store I go to say that the .40 is pretty snappy but then others say it's perfect. Most of them like the 9mm shield. They run 399.99 for either one at the store I go to. If any shield owners, from both calibers, have any suggestions or tips, they would be very appreciated.