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

The Zaffiri Precision ZPS.4 slide for Glock 19 Gen 3 is a precision-engineered optic-ready upgrade built for shooters who demand accuracy and reliability from their carry or duty pistol. Machined from a single billet of 17-4 stainless steel and manufactured entirely in the USA at Zaffiri's Largo, Florida facility, this slide combines tight tolerances with a professional finish to elevate your Gen 3 performance. The ZPS.4 comes pre-cut for popular red dot optics and arrives pre-coated, so you're ready to install glass and get to the range without additional gunsmithing.

If you're building a modern carry gun or upgrading an existing Gen 3 frame, the optic cut is milled to accept Trijicon RMR, SRO, Holosun 407C, 507C, and other standard RMR-footprint mounted systems. The cut is positioned forward of the factory rear sight dovetail, preserving your iron sight backup option. A black anodized cover plate and the correct mounting screws are included; Zaffiri specifies the hardware to ensure proper fit and retention, and recommends blue Loctite and strict adherence to your optic manufacturer's torque specs.

The ZPS.4 is compatible with Glock 19 Gen 3 frames, and also works with Gen 1 and Gen 2 models. It's also designed to work with popular aftermarket frames like the SCT 19, P80 PFC9, and PSA Dagger. The slide supports ZP ported barrels if you choose to go that route. Available in four Ceracote colors—Armor Black, Magpul FDE, Sniper Grey, and Magpul OD Green—you can match your aesthetic while maintaining durability. As a billet-machined part with no assembly included, you'll need to transfer your internals and fit it to your lower receiver or frame.

Key Features

• Single-billet 17-4 stainless steel construction with tight machining tolerances
• Pre-cut for RMR, SRO, 407C, 507C, and compatible RMR-footprint optics
• Pre-coated and ready to use—no additional machining required
• Black anodized optics cover plate and mounting screws included
• Rear sight dovetail intact for iron sight co-witness option
• 100% manufactured in the USA
• Compatible with Glock 19 Gen 3, Gen 1, Gen 2, and select aftermarket frames
• Supports ZP ported barrels
• Available in four Ceracote finishes

Specifications

Frequently Asked Questions

What optics are compatible with the ZPS.4 optic cut?

The slide is pre-cut to accept Trijicon RMR, Trijicon SRO, Holosun 407C, Holosun 507C, and other optics that use the standard RMR footprint. The cut is positioned forward of the factory rear sight dovetail, preserving your iron sight option. The correct mounting screws and a black anodized cover plate are included.

Will this slide work on my Gen 3 Glock 19 frame?

Yes, the ZPS.4 is designed for and compatible with Glock 19 Gen 3 frames. It is also compatible with Glock 19 Gen 1 and Gen 2 frames, as well as aftermarket frames including the SCT 19, P80 PFC9, and PSA Dagger.

Does this slide come assembled, and what do I need to do to install it?

No, this is a slide body only—no parts are assembled. You will need to transfer your firing pin, firing pin spring, extractor, and other internals from your existing slide, then fit the ZPS.4 to your lower receiver or frame. This is not a complete pistol or drop-in part; gunsmithing knowledge or professional fitting is recommended.

Can I use this slide with a ported barrel?

Yes, the ZPS.4 is compatible with ZP ported barrels. However, ZP ported barrels are only compatible with ZPS.P and ZPS.4 slides, so confirm your barrel choice before purchase.