Meprolight Green front/Orange rear fixed night sights offer a clear and sharp sight picture that is unsurpassed by any other brand of sight, regardless of light conditions. Meprolight sights are the brightest sight available today, appearing 30% brighter than other brands. Additionally, all Meprolight front dots are purposely brighter than the rear dots, encouraging a focus on the front sight and beyond. Meprolight was the first manufacturer of Tritium sights to receive the prestigious ISO 9002 certification. Meprolight Night Sights 10222O Fits 20,21,29,30,36,37,38,39.