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Fits Glock Models: 17MOS 19MOS 34MOS 17 17L 19 22 23 24 25 26 27 28 31 32 33 34 35 37 38 and 39. - 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 photoluminescent 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 acquisitioneven in transitional lighting. Additionally the front surface of the rear sight is steeply hooked to assist in emergency one-handed slide operation. The three dot green tritium night sight sets front sight features a taller blade and an aiming point ringed in photoluminescent 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 acquisitioneven in transitional lighting. Additionally the front surface of the rear sight is steeply hooked to assist in emergency one-handed slide operation. Green tritium lamps are warranted for 12 years from date of manufacture