Yes..I put one on my Searcy PH....ordered a Red fiber Optic 7.0MM from Brownells to replace the original.

Immense improvement in different light conditions at the range..especially with the sun in my eyes approaching twilight, where I had problems with the STD blade.

In "normal" light conditons, the fiber optic sight blade is much easier to pickup during quick target excercises etc.

For about 30 bucks from Brownells, give it a try, I think your old eyes will thank you (my did).