Looking to buy either an original 91/30 rear sight or one of the "target" peep sights pictured below, offering cash or trade PM me with what you've got, I've got a working sight base, just in need of the leaf assembly, spring, and pin, but I'll take it how I can get it.
I think the round receiver is different, and cannot fit the rear sight of the hex receiver, but. there are some exceptions. if the rear sight block has a smooth curved ramp, it is the later type and this earlier sight will not work.