Zaffiri Precision's 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. Zaffiri's Custom Line gives you the chance to select your own color(s), patterns, and optic cut! Find more information in the Resource Center Color Gallery. Please allow for an additional lead time in production due to custom coating and optic cuts. 100% made in the USA Machined from billet 17-4 Stainless Steel ZP Slide Model: ZPS.2 for Glock 20 Gen 3 Slide Model: ZPS.2 Caliber: 10mm Optic Cut Trijicon RMR / SRO and Holosun 407c / 507c