They come with the WGOS, which is an open sight mounted on the barrel, the WGRS is the peep sight that comes on the 45-70 BC, if you want the WGRS, H&R sells it for $25 shipped, but I don't know if they offer it with an accessory barrel. The front sight will be too low for it more than likely because the WGRS mounts in the two rear scope mount holes on the chamber which is higher than the barrel sight.
Tim