I've been considering a SU-16 for a while. I might be able to pick up an older SU-16A with the old plastic front sight for $450 cash. It only has a few hundred rounds through it and other than being dirty it seems to be in really good shape. If I do get it, what are the easiest options for replacing the front sight? I presume I can order a new set from KelTec and install myself? Any aftermarket options better? Or should I just wait, save some cash and try to find a SU-16C? Thanks!