Fits: Glock 20, 21, 25, 29, 30, 31, 32, 37, 40, and 41 all with optic cut and M.O.S. models; Sight Styles - Fiber (TSF), Optics Ready (OR); FiberLok Technology; This unique hybrid design not only ensures fast target acquisition but also delivers spectacular contrast; FiberLok technology allows shooters to quickly and easily change fiber colors for customizable and adaptive sighting; Offers high quality steel construction; CNC machined from bar stock to precise dimensions; QPQ Nitride finish for excellent durability and corrosion resistance; TAG OR line offers all the same great features as Tag Precision's Tactical sights in a taller package designed for use with the most popular dot optics; Only compatible with FiberLok Customization Pack 8.3mm; Optional green front fiber optic included