LEE ENFIELD NO 4 SINGER REAR SIGHT MK1 COMPLETE
Original Lee Enfield No.4 Mk1 Singer rear sight complete with the plunger, spring and cross pin.
Wartime Evolution of the No4 Lee Enfield Rear Sight
Most of the significant wartime simplifications we see on rifles from World War Two are from Germany and Japan, but the rear sight of the No4 Lee Enfield is a good example of a similar action taken by Britain. By 1942, the finely-made milled rear sight assembly of the rifle had become a limiting factor for production, and something needed to be done. So in 1942 a very simple two position “L” flip sight was adopted as a temporary solution. While that allowed production to speed up, a better solution was being developed by BSA. Late in 1942, the Mk III rear sight was adopted, effectively a stamped version of the original. This became the new standard, and some rifles with Mk II flip sights were update din the field by unit armorers.