Slight oversight on my part, but it's probably a good thing for those concerned about fakery. The locking slot is far enough more forward of the rear of the mount that my original scope won't lock in place. Purely intentional I'm sure.

I don't think it will affect the practical utility of the unit, at least for range use, so it'll be left unmodified for now.

Gotta do some parts finding or fabrication to the scope itself, first. It needs the "clicker" to hold the elevation ring at one setting and a spring that goes behind the objective nut. Unfortunately, I don't have another scope to copy these bits, so a little hunting is in order.