Ok, I have a 220ST with the first generation rail on it (the rounded kind not the new picatinny style.) I think that the origional style rail is the one used on the sport. I think Sig just used 220Sport frames before switching, though Im not positive. Having said that, is it possible, assuming the rail will work, can I convert a 220ST to a 220 sport? I understand some fitting may be required. BUT, could this conversion be possible?
Brian M