The SIG Sauer P320-XTEN 10mm pistol (part no. 320X5-10-BXR3-R2-10) brings full-power 10mm Auto to the proven P320 platform with a 5-inch barrel and a 10+1 capacity. Sig Sauer fits an optic-ready, serrated slide cut to the Romeo2 footprint, and pairs an XRay3 day/night front sight with an R2 rear so the pistol runs in any light straight out of the box. Two magazines come included. Whether the mission is backcountry defense against four-legged problems, handgun hunting, or simply owning the most capable of the big-bore semi-auto handguns, the P320-XTEN carries serious energy in a shootable, modern package.

Key Specifications

• The chambering is 10mm Auto, delivering flat-shooting, hard-hitting performance for field defense and hunting.
• The barrel measures 5 inches, wringing full velocity out of the 10mm cartridge while smoothing recoil impulse.
• Capacity is 10+1, keeping double-digit rounds of 10mm on tap.
• The pistol ships with two magazines, so one rides in the gun while the spare stays loaded.
• The sights are an XRay3 front with an R2 rear, giving fast, high-visibility aiming day or night.
• The slide is optic-ready, machined to accept red dots on the Sig Romeo2 footprint.
• The slide wears front and rear serrations, making press checks and racking positive with cold or gloved hands.
• The action is semi-auto on the P320 fire-control platform, known for its consistent trigger and modularity.
• The barrel finish is black, matching the pistol’s all-business appearance and resisting wear.

Frequently Asked Questions

Which red dots fit the P320-XTEN slide? The slide is cut to the Sig Romeo2 footprint, so optics matching that footprint mount directly.

How many magazines are included? Two 10-round magazines come in the case.

Is 10mm practical for woods carry? That is the P320-XTEN’s home turf: 10mm Auto delivers the penetration and energy that make it a favorite sidearm in bear and hog country.

Buy the SIG Sauer P320-XTEN 10mm

Few production pistols pair this much power with this much shootability. The P320-XTEN’s full-size grip, 5-inch sight radius, and night sights make heavy 10mm loads manageable, and the optic-ready slide leaves room to grow. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your local FFL.