Actually there were multiple problems. Shell wouldn't extract out of chamber. Discovered spring pack (pressure relief) on end of magazine tube was re-assembled wrong by someone. Also bolt and slide was gummed up from years of sitting plus it probably was never taken apart to and cleaned. no corosion, just carbon and dried up oil. Was going to assemble and test fire this weekend with existing extractor to see if it functions or not. I just seemed to me like this was something else that might be a problem when I function check. I don't see how it will insert and eject a shell the way it is. But then again I have never been into one of these shotguns.