Fits Gloack Standard Frames Models: 17, 17L, 19, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 37, 38, 39, and 45. (Does not fit MOS) The Trijicon HD XR™ Night Sights were specifically designed with the ever evolving challenges of law enforcement agencies in mind. Building on the features of the current HD™ Night Sig
