Behind Trijicon Fiber Sights is years of engineering and manufacturing experience in producing the industry’s leading night sight and fiber illuminated scopes and sights. Featuring similar fiber optic materials used in several Trijicon fiber optic scopes and sights, including the battle-proven ACOG, the Trijicon Fiber Sights are purposely engineered to bring the absolute brightest aiming point while retaining strength and maintaining a refined sight picture. Trijicon Fiber Sights come from the factory with a .060" red fiber pre-installed on the front sight, and an extra red and green fiber replacement in the package. Whether carrying or competing, these bright, thin sights create the perfect aiming point for fast, accurate rounds on target. SPECIFICATIONSBindon Aiming Concept™ (BAC):  No  Fits:  Make Glock  Fits Model:  17, 17L, 19, 22, 23, 24, 25,  26, 27, 28, 31, 32, 33, 34, 35, 37, 38, 39, and 45  Front Blade Width:  0.11 in. (2.79mm)  Front Blade Height:  0.215 in. (5.46mm)  Overall Front Blade Height:  0.268 in. (6.8mm)  Rear Notch Style:  Square-Notch  Rear Notch Width:  0.125 in. (3.17mm)  Rear Blade Height:  0.231 in. (5.86mm)  Overall Rear Height:  0.321 in. (8.15mm)  Fiber Color:  Red / Green