I hear you
But he's fired it and cleaned it a dozen times before. Something's wrong inside. With all my strength I can not move the slide either direction. I've tried sliding it with the trigger pulled all the way, depressed slightly and pushed forward. I've tried pushing the slide forward with a lot of force too - it just won't move. Is it possible that maybe he removed the stop and then pulled the trigger too soon or too late or something and now the trigger is in the way of the slide moving?