Description
The SIG Sauer P320 XTEN 10mm 5in Optic-Ready 10rd is a full-size X-Series handgun built for shooters who need 10mm power in a proven modular platform. It ships ready for optics, with XRAY3 day/night sights, a redesigned X-series polymer grip module, and a 5-inch bull barrel. This is a hunting-grade pistol that handles hot loads and delivers precision, straight from the box.
| Manufacturer | SIG Sauer (per manufacturer specs) |
|---|---|
| Model | P320 XTEN |
| Material | Stainless steel slide, polymer grip module |
| Compatibility | P320 X-Series holsters, optics cut (RMR, DPP, DeltaPoint Pro footprint) |
| Finish | Nitron |
| Weight | 30.5 oz (unloaded, per manufacturer specs) |
| Condition | New |
Key Features
- Optic-Ready Slide – Cut for common pistol reflex footprints (RMR, DPP, DeltaPoint Pro). WHY IT MATTERS: You can mount your preferred red dot without sending the slide out for milling, saving time and gunsmith costs.
- XRAY3 Day/Night Sights – Tritium front and rear with contrasting front ring. WHY IT MATTERS: You get instant sight acquisition in low light, and if your dot fails, you still have a combat-ready sight picture.
- 5-Inch Bull Barrel – Heavy-profile, no bushing. WHY IT MATTERS: The bull barrel adds weight forward for recoil control and improves inherent accuracy, especially when shooting 10mm hunting loads or high-pressure defensive ammo.
- X-Series Polymer Grip Module – Redesigned with aggressive texture and extended beavertail. WHY IT MATTERS: You get a locked-in purchase, even with wet hands, and the high tang reduces muzzle flip during rapid fire.
- 10-Round Magazines (Two Included) – Steel body, polymer basepad. WHY IT MATTERS: You get two magazines at purchase price, and the 10-round capacity complies with restricted-state laws while still giving you enough firepower for hunting or self-defense.
Who It’s For
This pistol is for the shooter who wants a 10mm handgun that can pull double duty as a hunting sidearm and a range gun. If you reload or buy heavy 10mm loads for hogs, bears, or steel targets, the P320 XTEN’s bull barrel and X-Series grip give you the control you need. It also fits anyone who already runs P320 holsters and wants to add 10mm without buying a new rig.
Pros / Cons
- Pros: Optic-ready slide saves aftermarket cost; XRAY3 sights are legit day/night; bull barrel improves accuracy; modular grip can be swapped for different sizes or colors; two 10-round mags included.
- Cons: The grip module is larger than the standard P320 grip – shooters with small hands may need to swap to a medium or small module (per owner feedback). Also, the 10-round capacity is a limitation for states that allow full-capacity magazines.
Comparison
| Feature | SIG Sauer P320 XTEN | Zev Technologies OZ9C | Agency Arms G34 |
|---|---|---|---|
| Caliber | 10mm | 9mm | 9mm |
| Barrel Length | 5 in (bull) | 4.5 in | 5.3 in |
| Optic Ready | Yes (RMR, DPP, DeltaPoint Pro) | Yes (RMR, DPP) | Yes (RMR, DPP) |
| Capacity | 10+1 | 17+1 | 17+1 |
| Weight (unloaded) | 30.5 oz | 26.1 oz | 28.4 oz |
| Price | $846.33 | $1,399.00 | $1,695.00 |
The P320 XTEN undercuts both competitors by hundreds of dollars while delivering a 10mm bull barrel and a proven modular system. It’s not a race gun, but for hunting and field use, it’s a better value.
FAQ
Is the SIG Sauer P320 XTEN compatible with standard P320 holsters?
Yes, the XTEN uses the same P320 frame dimensions as the full-size X-Series. Most holsters that fit a P320 X-Full will work, but we recommend checking the fit with your specific holster brand, especially if it has a closed muzzle end due to the 5-inch barrel.
What optics footprint does the slide accept?
The slide is cut for the SIG Sauer ROMEO1, ROMEO1 Pro, and also accepts the Trijicon RMR and RMRcc, Leupold DeltaPoint Pro, and Aimpoint ACRO (with adapter plate). The mounting pattern is the same as the P320 X-Series optics-ready models.
Can I use 40 S&W ammo in the P320 XTEN?
No. The P320 XTEN is chambered specifically for 10mm Auto. Do not attempt to fire .40 S&W in this barrel – the chamber dimensions are different, and it could cause a dangerous pressure spike.
Does the pistol come with a case or lock?
Yes, it ships in a SIG Sauer hard plastic case with two 10-round magazines, a cable lock, and the owner’s manual.
Why Buy From Us
- ✔ Nationwide delivery (all 50 states)
- ✔ Ships 1-2 business days
- ✔ 30-day returns
- ✔ Secure checkout
Browse more Semi Auto Handguns or check out our SIG Sauer Pistols category.
Last updated: April 2026
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