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If you're building out a P320 slide or need to replace internal components on an existing one, this kit gives you the factory parts without the markup. The corrosion-resistant finish handles whatever conditions you throw at it, whether that's humid climates, salt air, or just years of regular use.
What makes this different from aftermarket kits is that every part comes straight from Sig Sauer's own specs. You get the striker group assembly, extractor with all its pins and springs, and the rear slide cap. These are the internal guts that actually matter for function and longevity. Since it's OEM, the parts will play nice with any factory P320 slide you pair them with.
This isn't a field-strip job. You're getting into deeper work here, which is why Sig requires qualified installation. Taking the slide apart beyond field-stripped condition means you need either a certified armorer or a gunsmith who knows the platform inside and out. If installation goes sideways, your warranty is gone and you're paying for any repairs Sig has to make. That's not Sig being difficult, that's just the reality of precision work.
Whether you're putting together a custom slide assembly or refreshing components on a gun that's seen heavy use, having factory-spec parts keeps everything running true. The P320's modular design means you can swap and upgrade as needed, and having OEM internals ensures compatibility every time.
Installation goes beyond basic field stripping and requires deep disassembly of the slide. Sig Sauer requires only certified armorers to install these kits. If you're not trained on the platform, take it to a qualified gunsmith or certified armorer to avoid damaging your firearm and losing warranty coverage.
You'll still need to source the barrel, sights, and recoil assembly separately. This kit covers the internal slide components so you can focus on finishing the rest of your build or repair without overpaying for parts you might already have.
These are factory OEM parts designed for Sig P320 slides. Compatibility with aftermarket slides can vary depending on the manufacturer, so check the specific slide maker's specs before ordering if you're building with a third-party upper.
If your gun sees regular use or exposure to moisture, the corrosion-resistant treatment adds real durability without changing how the gun functions. It's especially worth it for guns that get carried regularly or used in humid environments where standard finishes wear faster.
| UPC | 798681664894 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 8900979 |
| Color | Black |
| Model | |
| Style | Kit |
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