Zps.3 G19 G3 9Mm Optic Ready Complete Slide Black

The Zaffiri Precision ZPS.3 G19 Gen 3 optic-ready complete slide is a precision-engineered upper assembly built for Glock 19 shooters who want factory-quality performance without the factory limitations. This is a complete slide kit—not just a slide, but a ready-to-run upper that combines Zaffiri's billet construction, a threaded barrel, sights, and all the internals you need to upgrade or build out your pistol. It's American-made in-house at Zaffiri's facility, which means tight tolerances and consistent quality from one unit to the next.

The slide itself is machined from 17-4 stainless steel in a single billet, giving you the rigidity and precision that aftermarket slides are known for—especially compared to the MIM parts found in factory Glock slides. The optics cut is pre-milled for RMR-footprint red dots (Trijicon RMR, Holosun 407C/507C/508T, SRO, and similar mounts), positioned ahead of the dovetail rear sight location so you can run both an optic and iron sights simultaneously. The included black anodized cover plate protects the cut until you mount your optic.

What you get in the box: the ZPS.3 slide in black, a threaded and black-nitride barrel, HD fiber sights, a complete upper parts kit with polymer recoil spring assembly, the mounting screws for your optic, and the cover plate. Everything is designed to work together on a Glock 19 Gen 3 frame—and it's also compatible with earlier Gen 1 and Gen 2 models. This is a no-guessing-game upgrade path for anyone looking to modernize their Glock's ergonomics and capability without buying a whole new pistol.

Installation is straightforward for anyone comfortable working on a Glock, though we recommend using the screws Zaffiri provides and applying blue Loctite for sight retention. Respect the optic manufacturer's torque specs to avoid over-tightening. Note that this product does not ship to New York or Washington state.

Key Features

• Single-billet 17-4 stainless steel slide machined for tight tolerances and durability
• Pre-milled optics cut compatible with Trijicon RMR, Holosun 407C/507C/508T, SRO, and other RMR-footprint red dots
• Included threaded barrel with black nitride finish
• HD fiber front and rear sights
• Complete upper parts kit with polymer recoil spring assembly—everything needed for installation
• Optics mounting screws and black cover plate included
• 100% American-made, manufactured in-house
• Compatible with Glock 19 Gen 3 frames and earlier Gen 1/2 models

Specifications

Frequently Asked Questions

Will this slide work on my Glock 19?

Yes, the ZPS.3 is designed for Glock 19 Gen 3 frames and is also compatible with Gen 1 and Gen 2 models. It will not fit other Glock models. Simply drop it onto your existing frame—no gunsmithing required.

What red dot sights fit the optics cut?

The slide is milled for RMR-footprint optics, including Trijicon RMR, Holosun 407C, 507C, and 508T, SRO, and other commonly used RMR-mount red dots. The optics cut is positioned in front of the dovetail rear sight, so you can use both an optic and iron sights.

Do I need to buy anything else to use this slide?

This is a complete upper assembly, so you get the slide, barrel, sights, internals, and recoil spring assembly. You'll need a Glock 19 Gen 3 frame and a red dot sight (if you want to use the optics cut). The mounting screws for your optic are included.

Can I use a factory Glock barrel instead of the one included?

The kit comes with a threaded barrel that is part of the complete assembly. Always follow Zaffiri Precision's assembly guidance and use the components provided unless you have confirmation of compatibility with replacement parts.