Zaffiri Precision ZPS.3, Optics Ready Stripped Slide, RMR Footprint, Lightening Cuts, Cerakote Finish, Armor Black, For Glock 17L Gen 3, Includes Black Anodized Optics Plate Cover and Screws ZPS.3.G17L.BLK Zaffiri Precision's single billet 17-4 stainless steel slides are made with tight tolerances that allow an increase in accuracy and performance. 100% American made and manufactured at their facility in Largo" FL. These are among the best aftermarket slides available for Glock.