In past times, only the octagon Rossi had the tapped tang

by guest, Friday, August 21, 2020, 14:00 (1555 days ago) @ Stevens416

for tang mounted aperature. Today, I do not know. But if the tang has the extra hole with filler screw, the Marbles is often chosen by Rossi shooters. Never mounted one myself, and you might wish to check with Marbles prior to ordering. Might also want to zero with factory sights, first, to make sure front sight square before spending money on a new sight.