The Trijicon Bright & Tough Night Sights feature the standard 3-Dot sight picture and can help increase the shooters accuracy when in low-light conditions. These shock resistant sights have a metal body for housing and a silicon rubber cushion. The lamps are contained in an aluminum cylinder and each lamp has a sapphire jewel at the cap for protection and even light distribution.Compatible with Ruger models: P90, P91, P93, P93 Compact, P95, P97.