no idea
go to the Smith webb site, it will tell you want u need to know.
I got my M & P 9 last dec. when they were offering two free mags and $50 rebate to boot. Great deal. After I had an action job done on it by Dave Bowie and different hi viz sites. this is my best shooting handgun by far. Just dead nuts accurate. It is my range gun more than anything and I just run a smake downthe barrel after each shoot and a drop of oil on the barrel and it is good to go. A very clean shooting gun IMO. Love everything about it and the price was super to. I really don't need 4 magazines but I got um no less.
If you want it buy it, screw the rebate if any, your msssing out on some good fun with this gun.