I probably have the same gun: 20 gauge, blued frame, 26" barrels (SK/SK), fabulous wood. Tried to get extra barrels a few years ago, and they just do not exist. Ruger told me that barrels from current production guns cannot be made to fit the early frames, so don't even try. When I finally buy a Red Label Sporting in 20 ga w/ 30" barrels, I'll try to swap the wood off my old gun (did I mention that the wood is fabulous?). These are very attractive guns with the blued frame.