Our single billet 17-4 stainless steel slides are manufactured with tight tolerances that allow an increase in accuracy and performance. 100% American made and manufactured. Our Custom Line gives you the chance to select your own color(s), patterns, and optic cut! Product Features Optic Cut - Trijicon RMR / SRO, Holosun 407c / 507c and other popular "RMR footprint" optics Pre-cut and Pre-coated Slide Model: ZPS.2 For Glock 20 Gen 1-3 Machined from billet 17-4 stainless steel construction Finish: Armor Black Cerakote Black anodized optics cover plate and screws included