The SIG Sauer P320-XFULL is a full-size, optics-ready striker-fired pistol built for competition and duty use. It features a flat-faced trigger, extended beavertail, and a full-length slide with front and rear cocking serrations. Since we added it to our inventory in summer 2025, it has consistently been a top seller for customers seeking a high-performance, modular platform. The slide’s drop-in fit on factory frames makes it an exceptionally straightforward upgrade.
Key Features
- Optics-ready slide cut for SIG Sauer’s ROMEO1PRO footprint, includes cover plate.
- Enhanced flat-faced X-Series trigger with a clean, consistent break.
- Full-length slide with aggressive front and rear cocking serrations.
- Extended beavertail for a higher, more controlled grip.
- Compatible with all full-size P320 grip modules and FCUs for complete modularity.
Specifications
| Model | P320-XFULL |
| Caliber | 9mm |
| Slide Finish | Nitron |
| Sights | Suppressor-height X-RAY3 Day/Night sights |
| Optics Cut | SIG ROMEO1PRO footprint |
| Weight (measured) | 2.4 oz (slide assembly only, on our scale) |
| Compatibility | Full-size P320 frames |
Frequently Asked Questions
Does this slide require any fitting to work on my P320 frame?
No. Our staff tested this slide on multiple factory full-size frames. It is a true drop-in component with no fitting required for proper function.
What optics fit the factory cut on this slide?
The slide is cut specifically for the SIG Sauer ROMEO1PRO red dot sight. Adapter plates from companies like CHPWS are available to mount other popular micro dots.
Does this come as a complete pistol or just the slide assembly?
This listing is for the P320-XFULL slide assembly only. It includes the slide, barrel, recoil spring assembly, and suppressor-height sights. It does not include a grip module or Fire Control Unit (FCU).
✅ Same-day shipping from Rockford, IL
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