Hi, all....... I saw a used S9 at a local dealer. It was already spoken for but asked to hold it anyway. When I did, I go this sense that said something like, "Yes....this is the one I've been waiting for). I found a used one on gunbroker. It was the ONLY one, used or otherwise. If you can't find one on gunbroker, then they can't be found! So I bought it. I'm now twiddling my thumbs, waiting for it to be shipped. Anyway......it has these fiber optic sights that I'm told are a fiber optic/tritium hybrid. Any experience with these? Also, these a sort of grooved track that runs down the back of the magazine funnel, inside the grip. Is there a function to this? Is there a Glock-style butt plug available? Thanks! I've never even fire a Steyr polymer gun before.