A co-worker gave me a bolt assembly out of a Rem 870 20ga said that it wouldn't extract the shell so he thought the extractor was broke. After looking it over it wasn't broke the plunger was stuck down far enough not to grab the shell. I soaked it for 2 day's in penitrating oil and nothing let soak another day got the plunger down far enough to get the extractor out but know its down far enough I can't grab it with anything. Is there any suggetions on what some of you would try or use to loosen rusted parts. I can't beleive how some people take care of there guns or should say don't. Thanks for any help.