Trijicon 601158 Bright & Tough Fits FN 509
https://www.tandktactical.com/shop/719307622265-trijicon-601158-bright-tough-fits-fn-509-49024
https://www.tandktactical.com/web/image/product.template/49024/image_1920?unique=1608106
Trijicon Bright & Tough SRO/RMR HD Mount/Integrated Night Sight Set No Tritium for FN 509.
