TDB

Before changing the sight, have you looked at colouring
it with something white or tritium (if you can get it ?).

Also, polishing the front blade so it is really shiny
and / or chaging the angle of the blade made a big diff
to me. If I remember correctly, it was almost vertical
when I got it.

And angle of 45 - 60 degrees gives much better
light reflection back to you.

Then it is a case of sorting the rear sight.