What other pistols from other brands have frames rails made of polymer or plastic like the Ruger P95 and P97 ? I have these guns and they amaze me at how many rounds have been through them yet they show no wear at all on the rails even though a steel slide cycles on them. Any idea if there are any other pistols that have this ? The Springfield XD / HS Product pistol has a front metal rail and a plastic rear but I can't find any other pistol that are all polymer on their rails.