Ultimate Arms Gear FNS9 FNS-9 9mm Green Fiber Fiberrod Rod Optic Pistol Handgun Front Sight .115in. Wide x .290in. Height Fiber Optic Green Front Sight Is A Great Way To Make Sure You Have A Great Advantage In The Field. This Illuminated Night Sight is made using incredibly durable materials that are guaranteed to last an incredibly long time without dimming or fading. Fiber Optic Front Sight .115in. Wide x .290in. Height Fiber Color: Green.