Absolutely best AND quickest sight combination I have ever used were on a Heym SR30 straight pull. I bellieve they were ERA. The rear was a pedastal with a windage adjustable blade that was shaped like a flat topped pyramid. It had a square notch and this notch had a yellow flourescent tube running vertically from bottom of blade. Front sight was a red flourescent bead adjustable for elevation. You just sat the red dot on top of the yellow vertical bar. They were quick. Have never seen another rear sight like them but don't have an ERA catalog,maybe they are listed. The rifle was a 35 Whelen carbine and I believe it was made specifically to shoot running boar in Germany. Except for the typical European butt stock it was one nice gun. And it WAS fast to shoot.