I just purchased a Steyr Scout 223 in FDE, pretty excited to get it but it's going to be a while because of our convenient 10-day wait here in the People's Republic of California. In the meantime, I have a few questions. I am purchasing a Leupold FX-II Scout scope to go along with it, and I am planning on getting the Leupold QRW rings to go along with it. To anyone who has this combination, will I need the low or medium sized rings? Can this rifle safely shoot 5.56 NATO, or .223 Remington only? I wouldn't mind upgrading the iron sights, are there aftermarket sights available to replace the standard polymer sights? Thanks!