The HD night sights were specifically created to address the needs of tactical shooters. The three dot green tritium night sight sets 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. Professional installation recommended. Specifications: - fits: 1911 Novak low mount dovetail cut models - color: yellow front outline - finish: black