Trijicon CP25F Bright & Tough Green Night Sight Three-dot iron sights that increase night-fire shooting accuracy by as much as five times over conventional sights Each lamp is capped with a sapphire jewel to help evenly distribute the light while protecting the lamp from solvents and puncture Contained within aluminum cylinders for additional protection Lamps are mounted on silicon rubber cushions to withstand shock and heavy recoil Green lamps are warranted for 12 years from the date of manufacture