Truglo Brite-Site Trituim-RugerŪ SR9/SR40\SR45 Green Dot TG231R1 Tritium maintains The Brightness Level Of The Sight In Low-Light (Or No-Light) conditions. That Means You Can See Your Sight Even In Complete Darkness, With Perfect Transition Through All Lighting conditions. Tritium Does Not Need Batteries And Does Not Need To Be Charged With Light- It Simply glows! These Traditional Tritium Night Sights Use The brightest Tritium Available. This Green Front Sight Is CNC-machined Steel And Fit Standard holsters. Front Sight Is Only For The RugerŪ SR9/40/45 To Include Compact Models. Type: Tritium Front Frame Material: Steel Frame Color: Black Firearm Fit: RugerŪ SR9/SR40 Style: Fixed Front Material: Tritium Rear Material: N/A Front Color: Green Rear Color: N/A Windage Adjustment: No Elevation Adjustment: No Firearm Type: Pistol