For tactical shooters, this Trijicon H& K HD Night Sight Set features an orange photo-luminescent paint outline, tall blade, three-dot green night sight, black wide U-shaped notch rear sight, and steeply hooked front surface. This sight fits Heckler & Koch .45C, .45 Tactical, P30, P30L, and VP9 models. The Trijicon HD Night Sights were built the tactical shooters in mind. The three dot green or yellow tritium night sight set’s front sight features a taller blade and an aiming point ringed in paint. The rear sight is outlined in black and features a wider U-shaped notch which allows for increased visibility. It also This unique configuration increases visibility and accelerates front sight acquisition even in fluctuating lighting. Additionally, the front surface of the rear sight is hooked to assist in emergency one-handed slide operation. Professional installation recommended. Specifications: Trijicon H& K P30 & 45C & VP9 HD Night Sight Orange HK110O