Zps.4 Slide Glock 19 Gen 3 9Mm Optic Ready Fde

The Zaffiri Precision ZPS.4 slide for Glock 19 Gen 3 is a precision-engineered, optic-ready replacement slide built for shooters who demand tighter tolerances and modern capability from their 9mm platform. Machined from a single block of 17-4 stainless steel and manufactured entirely in the USA at Zaffiri's Largo, Florida facility, this slide represents a substantial upgrade from factory Glock slides—tighter lockup translates directly to improved accuracy and reliability. If you're running a Gen 3 Glock 19 and want to mount a red dot without gunsmithing, the ZPS.4's factory-cut optics slot accepts Trijicon RMR, SRO, Holosun 407C, 507C, and other RMR-footprint optics. The slide ships pre-coated in Magpul FDE (Flat Dark Earth), pre-cut, and ready to assemble—no custom work needed.

The optic cut is positioned forward of the rear sight dovetail, so you retain your iron sights for backup without interference. Zaffiri includes all necessary mounting screws and a black anodized cover plate, though you'll want to apply blue Loctite and respect the optic maker's torque specs to ensure rock-solid zero retention. This slide is also compatible with earlier Gen 1 and Gen 2 Glock 19 frames, and will function with popular aftermarket frames like the SCT 19, P80 PFC9, and PSA Dagger, making it a flexible choice if you're experimenting with different platforms.

One detail worth noting: this slide is port-compatible, meaning it will cycle reliably with Zaffiri's ported barrel options if you decide to go that route later. Since the slide comes fully finished and pre-cut, customization options are locked in at the factory—there are no modifications possible after purchase. For serious Glock 19 shooters seeking American-made precision and modern optics-ready capability, the ZPS.4 is a straightforward, no-fuss upgrade.

Key Features

• Single-piece 17-4 stainless steel construction for superior durability and tight tolerances
• Optics ready with factory cuts for RMR, SRO, Holosun 407C, 507C, and compatible RMR-footprint red dots
• Magpul FDE Ceracote finish (armor black, sniper grey, and magpul OD green also available)
• 100% manufactured in the USA at Zaffiri's Florida facility
• Pre-cut and pre-coated; no gunsmithing required
• Compatible with Glock 19 Gen 3, Gen 2, and Gen 1 frames, plus aftermarket frames (SCT 19, P80 PFC9, PSA Dagger)
• Black anodized cover plate and mounting screws included
• Port-compatible with Zaffiri ported barrels
• Rear sight dovetail preserved for backup irons

Specifications

Frequently Asked Questions

Will this Glock 19 Gen 3 optic-ready slide fit my earlier Gen 1 or Gen 2 frame?

Yes. The ZPS.4 is designed for Gen 3 frames but is also compatible with Gen 1 and Gen 2 Glock 19 frames.

What red dot sights are compatible with the optic cut on this slide?

The slide is cut for Trijicon RMR, SRO, Holosun 407C, 507C, and other optics that use the standard RMR footprint. The optic mounting position sits forward of the rear sight dovetail, allowing you to retain your iron sights.

Is this slide cut and finished, or does it require gunsmithing?

The ZPS.4 arrives fully pre-cut and pre-coated in your chosen Ceracote color. No custom work is needed. It's ready for assembly with your frame and optic (using the included screws and cover plate).

What aftermarket frames will this slide work with?

In addition to Glock 19 Gen 1–3 frames, the ZPS.4 is compatible with the SCT 19, P80 PFC9, and PSA Dagger frames.

What's included in the box?

The slide, black anodized cover plate, and the proper mounting screws for your optic. You will need to supply the frame, barrel, trigger group, and optic.

Can I customize or modify this slide after purchase?

No. This slide is pre-cut and pre-coated at the factory, and no modifications can be made after purchase. Your choices for finish color and optic cut are final at order time.