I know that this is just a bit off subject - sort of - but I'm just trying to kick start a thread or two as things seem a bit slow lately.......

BUT, if anyone out there in Forumland has a No4 foresight protector that has a number stamped on the left side then what you have is a former Mk5 Sten Gun protector. It was put there to identify the Sten barrel to a particular gun in order for that gun to maintain its zero.

Many ex Indian No4's seem to have numbered foresight protectors taken off Mk5 Stens