Exactly, but if it came down to it, I think the time would be worth it for self preservation.
I still do not drink and carry, I don't want to have any inhibitions in the event I have to draw.
I have the M&P9C with night sights and it is a great gun. Aside from the reliability and customer service from S&W, these guns are very accurate, even with a compact barrel. The addition of a mag spacer gives it a full-size grip and is a nice option to have.
I would not hesitate on this deal, I purchased one and had it by the end of the week. Great little light and plenty bright for my needs. Also fits nicely on my M&P9C and sticks out about 1/2 - 3/4"