Re: 5r recoil pad
There are several posts around the web about folks taking and freezing their HS stocks for a day or so. Rumor has it, it makes glue that holds the buttpad on brittle and the pad can be easily removed with a few good wacks from a putty knife. Never tried to remove mine so I can't be certain of this theory, but look around on the web, I know lots of folks have tried this very thing.
Like others said though, once you get it off the stocks are hollow and have nothing to screw a new buttpad too. They either have to be glued back on or you have to mold something into the end of the stock to accept the screw in buttpad.