I wanted to know if other 4th gen owners experience the same. When I install the return spring in the slide I put it on the correct groove in the barrel. The end cap (plastic part) sits flush with the front of the slide. I then install the slide in the frame and pull is a few times. The end cap now stick a bit out of the front of the slide which I think is the way it should be judging by pictures of other 4th gen 17 I've seen. Now here's the weird part. When I remove the slide and check the spring, it does not sit at the groove in the barrel. It's about 1/16 of an inch too short. It just sits there stuck in the front hole of the slide with no tension against the barrel. It takes a couple of wiggled and twists and it will "pop" back all the way and now there is tension on it. Is this normal or is the spring defective? The gun came with the brass envelope that was dated 2/10/10 so it's a month old.