The Zaffiri Precision ZPS.3 slide for Glock 19 Gen 3 with RMR cut is a billet-machined, domestically manufactured upgrade designed for shooters who want tighter tolerances and modern optics mounting on their carry or duty gun. Built from 17-4 stainless steel and finished in Armor Black Cerakote, this slide ships pre-cut and pre-coated for RMR, SRO, and Holosun 407c/507c footprint red dots—no gunsmithing required. If you're running a Gen 3 Glock 19 and want to modernize it with a red dot sight while maintaining compatibility with your existing frame and internals, this is a purpose-built platform.

Zaffiri Precision manufactures these slides in-house at their Largo, Florida facility to tight tolerances that contribute to improved accuracy and reliability compared to standard OEM slides. The RMR-cut placement positions the optic forward of the factory rear dovetail, so your backup iron sights remain functional. The slide comes with the correct mounting screws and a black anodized cover plate; you'll just need to source your optic and apply the recommended blue Loctite to the mounting fasteners. This is a complete slide assembly—no additional parts or finishing work needed out of the box.

The ZPS.3 is compatible with your Gen 3 Glock 19 frame, as well as Gen 1 and Gen 2 models. It will also work with several popular aftermarket frames including the P80 PFC9, SCT 19, and PSA Dagger. Note that this slide is not ported and will not accept Zaffiri's ported barrel options (those require the ZPS.P or ZPS.4 slide instead). If you're building or upgrading a Glock 19 and want American-made precision with a modern optics-ready platform, the ZPS.3 delivers that without the complexity.