STI 2011® Fiber Optic Front Sight by Frank Proctor STI 2011® Fiber Optic Front Sight by Frank Proctor This fiber optic front sight for the STI 2011® is designed by Frank Proctor. This is a great option if you need a replacement front sight or you want to pair this sight with another rear .180... MSRP: Was: Now: $34.95 Choose Options