I purchased a SD40 about 6 months ago. I have probably put 100 rounds through it so far. I have noticed a clicking noise when pulling the slide back to chamber a round. This happens right about a half an inch when starting to pull. It sounds like metal striking the polymer and not metal on metal. I noticed this when it failed to chamber the next round (jamb), and I pulled to eject the jammed cartridge and the next 3 jammed as well. I took it apart and cleaned it, did not notice anything falling out or anything out of place. I reassembled it and tried it again and had no jamming issue, but the noise remained. I checked the local stores to see if anyone had one in stock to compare it to, but no luck. This may be normal and I just did not notice it before and just being paranoid. Does anyone have the SD40 or the SD40VE that can tell me if theirs does the same, or anyone experienced this and had to have repairs performed? Any help would be greatly appreciated.