I was given a Rem. model 760 that has been painted. I want to remove the paint. To clean the forstock I would like to remove it. The Rem. web site only shows a model 7600, similar action but mine has a welded support from the barrel to the front of the pump slide. How do I get the forestock off? There appears to be a pin at the front of the slide tube do I need to punch this out?