The HD Night Sights were specifically created to address the needs of tactical shooters. The three dot green tritium night sight set’s front sight features a taller blade and an aiming point ringed in photo luminescent paint while the rear sight is outlined in black and features a wider U-shaped notch. This unique configuration increases visibility and quickens front sight acquisition-even in transitional lighting. Additionally, the front surface of the rear sight is steeply hoOKed to assist in emergency one-handed slide operation. TRIJICON HD Yellow Night Sight For H&K P2000, P2000 SK (HK109Y).