flehto said:
Because of the limited range of MLers, don't really see any need for a "flip up" rear leaf sight.
Most of us would agree with that, but....
Pro: George Hanger, talking about his experience in this country during AWI, said: "Gentlemen, I can assure you, on my word, that the American riflemen have but one sight behind to their guns: I mean, by this, that they have no rising-sight, by which to give their guns a greater degree of elevation; and that one sight is not above two sixteenths of an inch in height above the barrel."
But remember, he's the one who reported an American rifleman shooting and nearly hitting him and Tarlington at 400 yards.
Con: Beaufroy, 1808, describing British rifle technology, said: "But supposing 300 yards be adapted as the utmost required range, we see no objection to having two flaps, viz. one filed down till point blank at 200 or 150, and the other at the 300 yards: or if 400 be taken as the utmost, let the sights be for 250 and 400 yards."
Here are some of the sights discussed:
Here is a 250 yard target, circles 4", 10" and 18":
Spence