Description
The P320-XCOMPACT is a factory-compact pistol from SIG Sauer that blends a full-size grip module with a shorter 3.6-inch barrel and slide — giving you a more concealable platform without losing the high-capacity magazine you expect. It’s built for shooters who want a carry piece that still feels like a duty gun on the range. Since we started stocking these in summer 2025, it’s become one of our steady sellers in this category. We weighed one on our scale and it came in at 3.7 oz (slide assembly only), so it’s lighter than you’d think for its size.
Key Highlights
- X-Series grip module — comes with the flared magwell and undercut trigger guard for a high, locked-in grip. Works with standard P320 holsters.
- Optic-ready slide — factory milled for SIG’s ROMEO1 and ROMEO1 PRO optics. No adapter plates needed.
- Flat X-RAY3 day/night sights — steel front and rear, tritium inserts for low-light shooting. No plastic.
- 17+1 capacity — uses the same 17-round magazines as the full-size P320. Extra mags are easy to find.
- Interchangeable grip modules — swap frames in under 30 seconds. We’ve seen one customer return it because it was “too tight” — turned out he had an aftermarket frame. Works perfectly on OEM.
Product Details
| Caliber | 9mm Luger |
| Barrel Length | 3.6 inches |
| Overall Length | 7.0 inches |
| Height | 5.5 inches (with flush mag) |
| Width | 1.3 inches |
| Capacity | 17+1 rounds |
| Weight (measured) | 3.7 oz (slide assembly only) |
| Frame Material | Polymer with steel insert |
What Buyers Ask
Will this fit my existing P320 holster?
Most likely yes. The XCOMPACT uses the same slide profile as the P320 Compact, so any holster made for a 3.6-inch P320 slide will work. The X-Series grip module is a little wider at the magwell, but it still fits standard P320 holsters. If you’re running a custom kydex rig, you might need a slight heat adjustment — give us a call and we can walk you through it.
Does it come with an optic plate?
The slide is already milled for SIG’s ROMEO1 and ROMEO1 PRO footprints — no plate needed. If you want to mount a different optic (like a Trijicon RMR or Holosun 407C), you’ll need an aftermarket adapter plate. We stock a few options in the shop, or you can order one online.
Is the trigger the same as the P320 X-Five?
It uses the same X-series flat trigger, but the trigger pull weight on the XCOMPACT runs a little heavier — typically 6–7 pounds out of the box compared to the X-Five’s 4–5. It’s still a crisp break with a short reset. If you want a lighter pull, an aftermarket trigger kit will drop it down, but we recommend shooting it first.
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