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Building out a Glock 19 Gen 5 slide from the ground up means you need every small internal part to work together, and that's exactly what this kit delivers. Zaffiri Precision put this parts kit together specifically for Gen 5 slides, sourcing every component from US manufacturers and machining them to the same tolerances Glock uses on factory parts. That attention to detail matters more than people realize, since a firing pin channel liner or extractor depressor plunger that's slightly off spec can cause feeding issues or light strikes down the road.
This kit is genuinely complete, not a partial set that leaves you hunting for extra pieces. Inside you'll find the firing pin spring, firing pin spacer sleeve, two spring cups, a nitride-treated firing pin safety and its spring, the extractor depressor plunger and plunger spring, a spring loaded bearing, firing pin channel liner, extractor, slide cover plate, and a full recoil spring assembly with an aluminum guide rod. That's every internal part needed to bring a bare Gen 5 slide to life.
Glock changed enough internally between generations that parts kits aren't interchangeable, and this one is built strictly for Gen 5 slides. If you're working on a Gen 3 or Gen 4 build, Zaffiri makes separate kits for those, so double check your slide generation before ordering. The nitride finish on the firing pin safety and extractor depressor plunger adds a layer of corrosion resistance and smoother cycling that holds up over thousands of rounds.
Whether you're assembling a Zaffiri Precision slide, another aftermarket Gen 5 slide, or just replacing tired internals on your factory setup, this kit gives you a reliable starting point. It's the kind of purchase that saves you from piecing together individual small parts from five different sources and hoping they all match up correctly.
You get every internal component needed to complete a stripped Gen 5 slide, including the firing pin spring and channel liner, firing pin safety and spring, extractor, extractor depressor plunger and spring, spring cups, spring loaded bearing, slide cover plate, and a complete recoil spring assembly with aluminum guide rod. It's a full build kit rather than a partial set.
No, this particular kit is machined specifically for Gen 5 slides and won't fit or function correctly on earlier generations. Zaffiri Precision makes separate kits for Gen 3 and Gen 4 builds, so make sure you match the kit to your slide's actual generation before installing.
Some experience with Glock disassembly and small parts installation definitely helps, since parts like the firing pin safety and spring loaded bearing take a careful hand. Plenty of builders install these themselves with patience and the right punches, but if you're not comfortable with it, having a gunsmith handle it removes any guesswork.
Yes, this kit is built to fit Gen 5 pattern dimensions, so it works with Zaffiri Precision slides as well as most other quality aftermarket Gen 5 slides on the market. Just keep in mind that fitment can vary slightly between slide makers, so minor adjustments are sometimes needed.
| UPC | 810220065150 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | UPK-G19G5 |
| Color | Black |
| Model | |
| Product Type | Kit |
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