Trijicon Bright and Tough Sight Set for FN 509 Features The Trijicon Bright and Tough sight set is purpose built for the FN 509 pairing a steel front sight blade with a rear mount plate designed to integrate with SRO and RMR footprint optics. The front sight measures 0.140 inch wide and 0.462 inch tall with an overall blade height of 0.525 inch dimensions chosen to co-witness properly with a mounted red dot. A square rear notch measuring 0.15 inch wide gives a clean fast sight picture for both traditional iron sight use and backup aiming when an optic is present. Because this set does not use tritium vials it relies on its precise geometry and steel construction for consistent repeatable performance. Constructed from steel and finished in matte black the sight set is built to withstand the wear of daily carry and frequent holstering. The mount plate attaches to the slide with a specified torque of 11 inch pounds ensuring a secure fit that supports reliable return to zero for the mounted optic. At just 1.5 ounces the set adds minimal weight to the pistol while upgrading its optic compatibility. The package includes the front sight rear mount plate mounting screws and a wrench giving FN 509 owners everything needed for installation and it is available for sale at GrabAGun. Trijicon Bright and Tough Sight Set for FN 509 Specifications Manufacturer: Trijicon Model: Bright and Tough Sight Set for FN 509 Compatible Hosts: FN 509 Material: Steel Color: Black Weight: 1.5 oz Front Blade Width: 0.140 Front Blade Height: 0.462 Overall Front Blade Height: 0.525 Rear Notch Width: 0.15 Mount Torque Spec: 11 in/lbs Included: Front Sight Rear Mount Plate Mount Screws Wrench Available At: GrabAGun