Very Rare and Mostly Pointless: the Bren Fixed Line Sight

Cool Forgotten Weapons merch! The very early production MkI Bren light machine guns were made with two dovetail brackets on the left side of the receiver. The rear one was for the standard rear sight, and the front one was to accommodate two types of optical sights. A mounting for the telescopic sight (the same one used not he No4(T) sniper rifle) was planned, but never produced. What was made in small numbers by the Plessey company was a “fixed line sight“. This was really more like a surveyor's tool than a traditional sight, and it used the same optical element as the Vickers dial sight that was introduced alongside it in 1939. The purpose was to allow a tripod-mounted Bren to be set up with specific limits to its field of fire, and then for the gun to be removed, used on the bipod elsewhere, and returned to the tripod and confirm the field of fire, esp