Trijicon H&K USP Compact HD Night Sight Set - Yellow Front Outline. The Trijicon H&K USP Compact Sight Set were specifically created to address the needs of tactical shooters. The three dot green Tritium Night Sight Set's front sight features a taller blade and an aiming point ringed in photoluminescent paint while the rear sight is outlined in black and features a wider U-shaped notch. This unique configuration from Trijicon increases visibility and quickens front sight acquisition-even in transitional lighting. Additionally the front surface of the rear sight is steeply hooked to assist in emergency one-handed slide operation. The Trijicon H&K USP Sight Set are designed to shine-even in the most demanding conditions. Light them up and cut them down with the Trijicon H&K USP Compact Illuminated HD Night Sight Set. Specifications for Trijicon H&K USP Compact HD Night Sights: Manufacturer: Trijicon Gun Make: Heckler & Koch Gun Model: Heckler & Koch USP Compact Color: Green Black Rear Sight Color: Green w/Black Outline Fabric/Material: Metal Front Material: Tritium/Paint Gun Type: Pistol Attachment Type: Professional installation recommended. Front Blade Height: 0.198 in Rear Blade Height: 0.185 in Condition: New Features of Trijicon Night Gun Sight Set: Front sight features a taller blade and an aiming point ringed in photoluminescent paint Rear sight is outlined in black and features a wider U-shaped notch Front surface of the rear sight is steeply hooked to assist in emergency one-handed slide operation The HD Night Sights are designed to shine in most demanding conditions. Package Contents: Trijicon H&K USP Compact HD Night Sight Set Trijicon HK108Y: H&K USP Compact HD Night Sight Set - Yellow Front Outline