Description
The Sig Sauer P320 X-Compact 9mm 3.6in XRAY3 Optic-Ready is a purpose-built concealed carry pistol that blends the modularity of the P320 platform with a compact, shootable frame. Chambered in 9mm, this striker-fired handgun features a 3.6-inch barrel, an XSeries compact grip module, and a serrated, optic-ready slide with a Nitron finish. It’s designed to run with or without a red dot, giving you flexibility for daily carry without sacrificing performance.
| Manufacturer | Sig Sauer |
|---|---|
| Model | P320 X-Compact |
| Material | Stainless steel slide, polymer grip module |
| Compatibility | Standard P320 holsters and magazines |
| Finish | Nitron |
| Weight | 25.0 oz (empty, per manufacturer specs) |
| Condition | New |
Key Features
- XSeries Compact Grip Module — gives you a full-size grip angle and texture in a frame that’s easy to conceal. The medium size fits most hands without needing a custom stipple job.
- Optic-Ready Slide with XRAY3 Day/Night Sights — you can mount a red dot directly, and the suppressor-height XRAY3 sights co-witness through most common optics. That means no excuses for not training with a dot.
- 3.6-Inch Carbon Steel Barrel — short enough to carry AIWB without poking, long enough to keep velocity up for defensive 9mm loads. It’s a sweet spot for EDC.
- Striker-Fired Action with Flat Trigger — the XSeries flat trigger breaks clean at around 4.5 lbs, giving you a consistent pull that’s easier to stage than a curved trigger under stress.
- Nitron Finish — this corrosion-resistant coating holds up against sweat, rain, and holster wear. You can carry it daily without watching the finish fade in six months.
Who It’s For
This pistol is built for the daily carrier who wants an optic-ready handgun that doesn’t print like a full-size. It’s for shooters who already run a P320 and want a smaller version for summer carry, or anyone stepping up from a micro-compact to something with a better grip and faster sight picture. If you carry appendix, the X-Compact’s 3.6-inch barrel and rounded profile make it comfortable without a wedge.
Pros and Cons
- Pro: Modular fire control unit (FCU) lets you swap grip modules and calibers without a new serial number. That’s a real money saver if you like tinkering.
- Con: The XSeries grip texture is aggressive—some carriers find it rough against bare skin under a T-shirt. A little sandpaper or a Talon grip wrap solves it, but it’s worth noting.
- Pro: Optic-ready out of the box with no milling needed. You can mount a Romeo1Pro, DeltaPoint Pro, or RMR with the right plate.
Comparison
| Feature | Sig Sauer P320 X-Compact | Glock 19 Gen5 MOS | Smith & Wesson M&P9 M2.0 Compact |
|---|---|---|---|
| Barrel Length | 3.6 in | 4.02 in | 4.0 in |
| Weight (empty) | 25.0 oz | 23.6 oz | 24.3 oz |
| Optic Ready | Yes (direct mount) | Yes (MOS plates) | Yes (C.O.R.E. plates) |
| Grip Module | Interchangeable (FCU) | Fixed frame | Interchangeable backstraps |
| Trigger | Flat, 4.5 lb | Curved, 5.5 lb | Curved, 5.0 lb |
| Price | $729.99 | $599 (street) | $569 (street) |
FAQ
Does the Sig Sauer P320 X-Compact 9mm 3.6in XRAY3 Optic-Ready come with optic mounting plates?
Yes, the pistol ships with one mounting plate for the SIG ROMEO1Pro footprint. For other optics like the Trijicon RMR or Leupold DeltaPoint Pro, you’ll need to buy an aftermarket plate from Sig or a third party. The XRAY3 sights are tall enough to co-witness with most common red dots.
What holsters are compatible with the P320 X-Compact?
Most P320 holsters designed for the 3.6-inch barrel and XSeries grip module will fit. Brands like Trex Arms, Tier 1 Concealed, and Vedder make specific models for the X-Compact. Always confirm holster length and retention style before buying.
Can I use standard P320 magazines in the X-Compact?
Yes, any P320 magazine works. The X-Compact ships with two 15-round flush-fit mags, but you can also run 17-, 21-, or 30-round magazines for range use or reloads.
Is the P320 X-Compact reliable for everyday carry?
Per Sig Sauer specs, the P320 platform has passed military and law enforcement testing. The X-Compact shares the same FCU and barrel system as the full-size models. With proper maintenance, it’s as reliable as any striker-fired duty pistol on the market. Over 2 million P320s have been sold since 2014, making it one of the most tested handgun platforms in the world.
Last updated: April 2026
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