In which we test as many types of Lee-Enfield No.4 rear sight as possible, to see at what range setting on the leaf corresponds to the point of impact given by the battle sight with the leaf folded down. A surprising result, which needs more empirical research in respect of the Mk.1 milled sights!

Also includes a discussion of the whys and wherefores of the different types.

Link to results: https://docs.google.com/spreadsheets/d/17XJVvFKeL4DoWZaaog38jZveZDACzdZnjwQLIK4GdTE/edit?usp=sharing