I have recently purchased FNS9 and so far I am liking it. I am still in the process of breaking it in. So far 230 rounds through and not a single malfunction. However, I noticed something that has more with looks than function. After range trip I have stripped the gun cleaned it and reassembled it. When completing final wipe down, I have noticed that slide and frame do not align flush at the rear of the pistol. I mean, it is on straight and everything but minuscule part of rear rail is visible. It looks like slide is forward by 1 millimeter. Few days ago I have checked another FNS at the store and that one was aligned flush in the back. I looked at some pictures/videos and some of FNS I have seen are fully aligned/flush and some are not. At this point I don't think it is an issue since gun functions flawlessly. And I don't want to send it to the FN if I don't have to. So I am wondering if others experienced similar issue of the slide not being completely flush with the frame at the back.