Lee Enfield No4 Rifle "Singer" Milled Micrometer Sight
A New Old Spares "Singer" rear sight for the Lee Enfield No 4 Rifle.
These are calibrated for the longer sight radius of the Rifle and use a unique thread for the elevation clicker to achieve 2 MOA increments - scale is marked for the Mk7 British 303 round from 200 to 1300 yards. The screw mechanism does allow a couple of clicks above this max range and a couple of clicks below the min range for you to set a working 100 yard zero (count whole positive clicks down).
Ideal to restore or replace the rear sight on your No4 Rifle - perfect for one made by BSA.