Hi, I just purchased a used bull pup shotgun yesterday. I shot a few rounds in it and it seemed to work perfectly. So I decided to take it home and clean it up. Well, to make a long story short, now when the chamber is empty, you don't have to press the release button behind the trigger to get it to rack. I am pretty sure that it worked properly before I took it apart. I am correct in thinking that when the chamber and tube are empty, you should have to press the release to get it to slide, right?? I didn't take the trigger assembly out, only removed the plastic stocks and cleaned the outside of the gun up. Can anyone help? Thanks, R. G.