The HD Night Sights 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 photo luminescent paint while the rear sight is outlined in black and features a wider U-shaped notch. This unique configuration 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. Green tritium lamps are warranted for 12 years from date of manufacture. Specifications for Trijicon Heavy Duty Night Sights Yellow Front Outline Fits Glock 42 GL113-C-600784: Manufacturer: Trijicon Gun Make: Glock Gun Model: Glock 48, Glock 43X, Glock 43, Glock 42 Color: Yellow, Green Front Sight Color: Green w/Yellow Outline 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: 0.215 in Rear Blade Height: 0.201 in Condition: New Package Contents: Trijicon Heavy Duty Night Sights Yellow Front Outline Fits Glock 42 GL113-C-600784 The Trijicon Heavy Duty Night Sights Yellow Front Outline Glock 42 GL113-C-600784 is a quality addition to the Trijicon lineup. For more great deals on Tritium Pistol Sights by Trijicon, please browse our Trijicon Tritium & Fiber Optic Night Sights page.