The Trijicon Bright & Tough Night Sight Supp Set delivers rugged, battery-free performance for Glock shooters, designed to fit Glock Models: 20, 21, 29, 30, 36, 40, and 41 (including S and SF variants). Trijicon Bright & Tough Night Sights are three-dot iron sights that increase night-fire shooting accuracy by as much as five times over conventional sights, while delivering instinctive-shooting speed with no reliance on batteries. Housed in a durable metal body and cushioned within silicone rubber, these sights feature a shock-resistant design that thrives under recoil and rough handling. Each lamp is capped with a sapphire jewel to help evenly distribute light and protect the lamp from solvents and puncture, with the lamps contained within aluminum cylinders for added protection. The silicone rubber cushions further absorb shock, ensuring reliable performance across demanding conditions. Green lamps are warranted for 12 years from the date of manufacture, making these sights a long-lasting upgrade for dependable target acquisition and improved accuracy in low-light situations.