Trijicon Bright & Tough Night Sight Set for FN 509 Black. Housed in a metal body and cushioned within silicon rubber these Trijicon Tritium & Iron Night Sights feature a unique shock-resistant design that contains the lamps within aluminum cylinders for additional protection. Each lamp in the Trijicon Bright & Tough Tritium Night Sight is capped with a sapphire jewel to help evenly distribute the light while protecting the lamp from solvents and puncture. Contained within aluminum cylinders for additional protection the lamps are mounted on silicone rubber cushions to withstand shock and heavy recoil. When you need to increase your night-fire shooting accuracy by as much as five times then you need the Trijicon Bright & Tough Night Sight Set. Specifications for Trijicon Bright & Tough Night Sight Set: Manufacturer: Trijicon Gun Make: FN Herstal Gun Model: FN 509 Color: Green/Green Black Front Sight Color: Green w/White Outline Rear Sight Color: Green w/White Outline Fabric/Material: Metal Front Material: Tritium/Paint Gun Type: Pistol Attachment Type: Professional installation recommended. Front Blade Height: 0.179 in Rear Blade Height: 0.26 in Features of Trijicon Bright & Tough Night Sight Set: Bright & Tough Night Sights feature a unique shock-resistant design Each lamp is capped with a sapphire jewel to help evenly distribute the light while protecting the lamp from solvents and puncture Lamps are mounted on silicone rubber cushions to withstand shock and heavy recoil Green lamps warranted for 12 years from the date of manufacture Professional installation recommended. Package Contents: Trijicon Bright & Tough Night Sight Set Trijicon 600988: Bright & Tough Night Sight Set for FN 509 Black