Before and after purchasing a 938 Extreme I watched reviews, videos and forums about these pistols. There's a lot of information out there on them good and bad. One of the problems people talked about was the little spring Sig refers to as the slide stop pin and how it can bend easy. Don't catch it with a rag cleaning it and bend it. Mine got bent and the radius of the spring popped out from the pocket. The big issue on a video, is now that the spring is bent the slide stop falls out so you have to replace it. This made me take a hard look at mine. I put the slide stop side down and cycled the slide and sure enough, the slide stop dropped right out. I was kicking myself for messing up my new gun before I started carrying it. Long story short, I took the slide off and put the slide stop in the frame and it worked as it should. The pin is there to keep the stop in the down position, and when you push it up it returns back down via the pin. I pushed the pin(spring) back into the pocket and it functioned as it should. Put everything back together and caked Sig customer service and they said the same thing, that the slide stop will fall right onto the bench if it is lined up with the clearance hole in the slide. I'm posting this in hopes it will save people from a lot of aggravation. The slide stop pin(spring) does nothing to capture the slide stop from falling out. Bending the pin may put enough tension on the stop to hold it but it isn't nessesary.