https://thegreatmodel8.net/

Went to a local gun show not expecting to find much. No M8's or M81's were there. Walked by a table that one of the better local gun smiths sometimes has if the show is big enough. I was looking throug several little glass topped display boxes that contained old varnier tang sights and such and said to my shooting partner it would be nice if I found a tang sight for the Remington M81 when I spotted this! My lucky day for sure!

That's when I get in the most trouble, when I'm not looking for anything.

Looks like you "done good". Even as that little flip up thingy (pretty sure that's the official term for it) that is often missing. Way-cool find.