Mine is not the railed version, but the pin is in the exact same location as your's. My pin is not a standard roll pin like the one in your pic, it is smooth on both sides of the slide but the pin is the same size and in the same location. I personally would not worry about it, but if you are concerned Sig Sauer has a service through their custom shop where you can send them any Sig that you purchased used and they will completely strip the gun down to individual parts, replace anything that is damaged, worn, incorrect, so on and so forth, completely rebuild the gun as far as the mechanics of the gun go, put it in a new sig case and send it back to you and then I believe they place a warranty on the weapon seeing as how it is a factory rebuild. The service is about $100-150 if my memory is correct. Information about this can be found on sigsauer.com under their price list of custom services. I have used their custom shop services a couple of times and they are very good people to work with. Hope this helps.