Sig Sauer P320 XTen

Why 10mm in a P320? The Case for the XTen

The P320 XTen was developed specifically for hunters, outdoorspeople, and shooters who want the 10mm Auto’s significant energy advantage over 9mm in a modern, optics-ready platform. A 180-grain 10mm at 1,200+ fps from the XTen’s 5″ barrel produces approximately 580+ ft-lbs of muzzle energy—enough for deer-sized game at handgun distances and serious deterrence against large predators. The XTen delivers this in the P320’s modular chassis with 15+1 capacity, which is higher than the Glock 40 (15+1) and significantly higher than the 1911-based Delta Elite (8+1). For a hunter wanting a 10mm semi-auto or a shooter wanting the best combination of capacity and power, the XTen is a compelling choice.

XTen vs. Glock 40 MOS: The 10mm Long-Slide Comparison

The Sig P320 XTen and Glock 40 MOS are the two premium full-size 10mm semi-automatics most commonly compared. Both offer 15+1 capacity in a long-slide optics-ready configuration. The Glock 40 has a 6.02″ barrel vs. the XTen’s 5″—slightly more velocity and longer sight radius. The XTen’s P320 modular platform allows grip module swaps for a personalized fit; the Glock 40 uses standard Glock grip configuration. The XTen’s factory XRAY3 night sights are superior to Glock’s standard plastic sights. For a shooter who values customization and factory sights, the XTen wins; for a shooter with an established Glock ecosystem and preference for the longer barrel, the G40 is the choice.

XTen for Hunting: 10mm as a Hunting Handgun

The P320 XTen’s 5″ barrel produces full 10mm velocity for hunting applications. A 200-grain hard-cast or hunting bullet at 1,150+ fps delivers adequate penetration for deer inside 50 yards and is the choice load for bear country carry. The optics-ready slide accepts red dot sights that extend practical hunting accuracy to 75–100 yards for experienced shooters. The XTen’s 15-round capacity provides more follow-up shots than any other production 10mm, which matters for situations involving dangerous game. Combined with the P320’s proven reliability, the XTen is the strongest production option for a hunter who wants a 10mm semi-auto.

P320 XTen Comp: The Competition Variant

Sig also produces the P320 XTen Comp, a variant with a 3.8″ compensated barrel and optic-ready slide optimized for competition shooting. The compensator reduces muzzle flip significantly under 10mm recoil, making rapid follow-up shots faster. The Comp variant trades some velocity (3.8″ vs. 5″ barrel) for improved shootability in competitive settings. For a USPSA or practical shooting competitor who wants to run 10mm for Major power factor, the XTen Comp is purpose-built for that application.

P320 Modularity: What It Means for XTen Owners

The P320’s modular fire control unit (FCU) is the serialized component—the grip module, slide, and barrel are all unregulated accessories. An XTen owner can swap to a different grip module for a better fit, convert to a different P320 caliber by swapping the slide and barrel assembly, or run different optic mounting systems without modifying the serialized FCU. This modularity is unique to the P320 platform and provides long-term flexibility that single-caliber pistols can’t match.

Frequently Asked Questions: Sig Sauer P320 XTen

What is the Sig Sauer P320 XTen?
The P320 XTen is a full-size 10mm Auto variant of the Sig Sauer P320 modular pistol platform, featuring a 5-inch barrel, 15-round capacity, and optics-ready slide. It delivers full-power 10mm performance on the P320’s proven modular chassis, giving 10mm buyers the FCU serialized component swap capability and broad aftermarket support of the P320 ecosystem in a powerful hunting and defense caliber.

How does the P320 XTen compare to the Glock 20 in 10mm?
The Glock 20 is the most established 10mm semi-automatic pistol with the deepest aftermarket support. The P320 XTen offers Sig Sauer’s superior factory trigger, the modular FCU system allowing caliber and size conversion, and an optics-ready slide from the factory. Both are excellent 10mm choices; the G20 wins on aftermarket depth, the XTen wins on factory features and trigger quality.

Is the P320 XTen good for hunting?
Yes. The P320 XTen with full-power 10mm loads is an effective hunting and backcountry defense pistol. The 5-inch barrel maximizes 10mm velocity for improved terminal performance on deer, hogs, and bear, and the optics-ready slide makes it straightforward to mount a red dot for field accuracy.

See Also: Sig Sauer P320 • Sig Sauer • 10mm Ammo • Glock 20