Here are some photos of the way I make a front sight with an ivory blade. Basically I just capture a tapered piece of ivory between the bottomof the dovetail and a tapered slot in a metal sight base.
Ivory front sight mounted on a brass pistol barrel with a steel base
Top view of 2 piece front sight assembly
Top view of the 2 pieces disassembled
Side view of the 2 pieces disassembled
Side view being assembled
Side view assembled
DMR