Zaffiri Precision ZPS.P Stainless Steel Slides were designed with tight tolerances to increase accuracy and performance. These are among the best aftermarket slides available for Glock.Fits Glock 17 - Gen 3 frame. Also compatible with Polymer 80 - PF940v2. FeaturesMachined from 17-4 Stainless SteelCannel liner is not installed and not included.This ported slide is designed to be used with Zaffiri Precision's matching ported barrel, however it can also be used with any oem or threaded length barrel. Optics Cut:Trijicon RMR / SRO and Holosun 407c / 507c and other popular "RMR footprint" optics - mounting position is in front of the factory location of the rear sight (dovetail remains behind the optic cut). Includes black anodized cover plate. Slide comes with proper mounting screws specific to the optic. You must use the screws Zaffiri Precision provided. Blue Loctite recommended for proper sight retention. Do not exceed optic manufacturer's screw t...