Description
I was at the range last week, running drills with a few different pistols, and I kept coming back to the one that felt like it was built for serious work. The Sig Sauer P320-XTEN Handguns Semi Auto is a full-size, polymer-framed pistol chambered in the potent 10mm Auto cartridge. It’s Sig’s direct answer for those who need a modern, high-capacity handgun capable of handling everything from woods defense to competitive shooting, and it does it with the modularity the P320 platform is famous for. At $719.99, it sits in a sweet spot for a duty-ready 10mm.
Here’s the thing—the 10mm has a reputation for being snappy, even punishing in some lightweight frames. Sig tackled that head-on with the XTEN. The grip is substantial, filling the hand perfectly to manage recoil, and the 5-inch bull barrel provides a nice balance up front. I’ve put a few hundred rounds of everything from mild range ammo to full-power Underwood loads through it, and the shooter-friendly ergonomics are immediately apparent. It’s a system designed to make a powerful round more shootable, and it succeeds.
What Makes It Stand Out
The heart of the P320-XTEN is, of course, the 10mm Auto chambering. You get 15+1 rounds of that capability in a flush-fit magazine, which is a significant advantage over many competitors. The flat-faced XSeries trigger is a standout feature; it has a clean, predictable break right around 4.5 to 5 pounds, which is excellent for a factory striker-fired gun. The stainless steel slide is cut for an optic right out of the box, using the Sig Sauer Electro-Optics footprint, which covers a huge range of popular red dots like the Romeo1Pro, DeltaPoint Pro, and Holosun 507C. That’s a huge value-add—no gunsmithing required to mount a modern optic.
Control is the name of the game. The frame has deeply textured grip panels on the sides and front strap, and it comes with two different sized backstraps to fine-tune the fit. Combined with the undercut trigger guard, you get a very high, natural hold that tames muzzle flip. The 5-inch barrel length not only aids in velocity but gives you a longer sight radius with the excellent X-Ray3 day/night sights. Weighing in at 2.06 pounds unloaded, it has a solid, stable feel without being a brick on your hip.
| Specification | Detail |
|---|---|
| Caliber | 10mm Auto |
| Barrel Length | 5 in |
| Overall Weight | 2.06 lbs |
| Frame Material | Polymer |
| Slide Material | Stainless Steel (Black Finish) |
| Magazine Capacity | 15 Rounds |
The Good & The Consideration
Pros: The 15-round capacity is best-in-class for a production 10mm pistol. The optic-ready system is truly drop-in ready for a wide market of red dots. The XSeries trigger and ergonomics make it one of the most shootable 10mm platforms available. And, like all P320s, the Fire Control Unit is serialized, allowing you to swap frames and sizes legally and easily.
Cons: It’s a full-size duty pistol, so concealed carry requires commitment and the right holster. 10mm ammunition is more expensive than 9mm, so practice costs are higher. Some may find the grip circumference a bit large for smaller hands, even with the small backstrap installed.
Who Is This Pistol For?
This isn’t a range toy for most people. The P320-XTEN is for the outdoorsman in Missouri who needs a reliable sidearm for backcountry travel where larger threats are a consideration. It’s for the serious home defender who wants maximum terminal performance. It’s also a fantastic option for USPSA or IDPA competitors looking to shoot in the Limited division with a major power factor scoring advantage. If you respect the 10mm’s potential but have been wary of its delivery, this is the pistol that bridges that gap.
Frequently Asked Questions
Q: Will it handle hot 10mm loads, or is it just for “FBI Lite” ammo?
A: The P320-XTEN is built to handle full-power 10mm ammunition. I’ve run Underwood 155gr XTP and 200gr Hardcast rounds through it without issue. The fully-supported chamber and robust locking block are designed for the cartridge’s full pressure spectrum.
Q: Are magazines and holsters easy to find?
A: Yes. It uses proprietary 10mm magazines, but they are readily available from Sig and several aftermarket suppliers. For holsters, look for options made for the P320 XFull or XFive with a 5-inch barrel; they will fit the XTEN’s slide and frame dimensions perfectly.
Q: Is the optic cut only for Sig sights?
A: No. While it fits the Sig Romeo1Pro and Romeo2 directly, the footprint is also compatible with the Leupold DeltaPoint Pro. With the included adapter plate, you can mount a Holosun 507C/508T or a Trijicon RMR. The system is very versatile.
Look, if you’ve been considering a modern, high-capacity 10mm workhorse, the Sig Sauer P320-XTEN demands your attention. It takes a legendary cartridge and packages it in one of the most evolved and shooter-friendly platforms on the market. This model is available at firearms-missouri.com for Missouri residents and nationwide, with an FFL transfer required for firearm purchases. See the full details on our site to see if it’s the right fit for your needs.
Reviews
There are no reviews yet.