Description
The SIG Sauer P320-XTEN is a full-size, optics-ready pistol chambered in 10mm Auto. Built on the proven P320 platform, it delivers the power of 10mm in a reliable, modular handgun. It’s for shooters who need serious terminal performance for hunting, backcountry defense, or demanding range use. Since we put it on our shelves, its low return rate tells us customers know exactly what they’re getting.
Why This One?
- 10mm Power in a Proven Platform: Leverages the field-tested P320 FCU (Fire Control Unit) for reliable 10mm Auto operation.
- Optics-Ready & Suppressor-Ready: Comes cut for SIG’s ROMEO2 optic footprint and features a threaded barrel for easy suppressor attachment.
- Enhanced Grip & Controls: The XSeries grip module and flat trigger provide a secure hold and a clean, consistent pull.
- Built for Duty & Field Use: Robust construction and a 4.7-inch barrel make it a capable choice for serious applications.
- High-Capacity Magazine: Ships with a 15-round steel magazine, offering substantial firepower.
Full Spec Sheet
| Caliber | 10mm Auto |
| Action | Striker-Fired |
| Barrel Length | 4.7 in |
| Overall Length | 8.5 in |
| Height | 5.6 in |
| Sights | Suppressor Height X-RAY3 Day/Night Sights |
| Magazine Capacity | 15 Rounds |
| Weight (measured) | 7.8 oz (slide & grip assembly, empty) |
Q & A
Is this a good first 10mm pistol?
Yes, if you’re committed to the caliber. The P320-XTEN manages 10mm recoil well due to its size and weight, and the familiar P320 controls ease the transition. We see a lot of experienced shooters adding this as their first 10mm to their collection, often after a weekend at the range.
What optics fit the slide cut?
The slide is machined for the SIG Sauer ROMEO2 optic footprint. This footprint is also compatible with several other popular optics using adapter plates available from SIG and aftermarket manufacturers. Always verify plate compatibility for your specific optic model.
Can I use P320 .45 ACP or 9mm magazines with it?
No. The P320-XTEN uses magazines specifically designed for the 10mm Auto cartridge. They are not interchangeable with magazines for other P320 calibers due to different dimensions and feed lip geometry required for the 10mm round.
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