Skip to main content

SIG Sauer P320-XTen 10mm Pistol: Full Review

SIG Sauer have adapted their tried and true P320 platform to accommodate the powerful 10mm cartridge. Here's a full review.

SIG Sauer P320-XTen 10mm Pistol: Full Review

(Photo by Mark Fingar)

After months of whispering, SIG Sauer unveiled the new P320-XTen, moving the P320 up a full centimeter. With the introduction of the P320 series in 2014, SIG Sauer took the idea of a modular, chassis-­based pistol system mainstream. The P320 series evolved quickly, even while the U.S. military adopted early configurations of the P320 as the M17 and M18.

gaad-ph-sig-p320-xten-02-1200x800
Making the move to 10mm on the XTen required a redesign of the P320 FCU that increased the scale of the pistol. The barrel length, grip, texture and overall ergonomics were all optimized for the 10mm cartridge. (Photo by Mark Fingar)

Announced on May 26, 2022, the P320 design is now chambered in the powerful 10mm. Called “XTen,” it is a full-­sized, variant of the P320 X-frame built around the stainless-steel P320 fire-control unit (FCU). The P320-XTen ($799) model introduces a new, large-size frame and slide. Fans of big-­bore, full-sized pistols should consider this new entry, which competes against the Springfield Armory XDm Elite OSP ($653), Glock 20 ($649), and Smith & Wesson M&P10 ($665), to name a few. 

gaad-ph-sig-p320-xten-04-1200x800
An increase in size and recoil energy warranted a more aggressive grip for the XTen grip module. It is now more of a shark-skin-like texture that helps with recoil management of the 10mm cartridge. (Photo by Mark Fingar)

At 81/2 inches long, the XTen is a half-inch longer than the closest comparable P320 9mm variant. Its 33-­ounce heft is 3 ounces heavier, too, and the width remains the same. The longer 10mm cartridge did necessitate a slightly larger frame in the grip area. Looking at the stats on paper is deceiving.

gaad-ph-sig-p320-xten-05-1200x800
A large triggerguard accommodates large fingers and gloved hands without issue. The trigger shoe is flat, and an ambi mag release expands the avenues of control available when handling the pistol. (Photo by Mark Fingar)

That extra size of the P320-XTen is mitigated by the thoughtful design of the improved X-­series grip module. The deep undercut at the back of the triggerguard and the beavertail allow the user’s hands to get high on the pistol. The polymer frame also features a newly engineered grip texture for the heavier recoiling 10mm cartridge. The rough texture is reminiscent of shark skin and is embossed into the frame in panels on the sides of the grip, the frontstrap and the backstrap. 

gaad-ph-sig-p320-xten-06-1200x800
Robustness is needed for any 10mm that is at least somewhat manageable to control. The FCU is no exception. The large XTen grip module showed resistance to the test’s bout with inclimate weather. (Photo by Mark Fingar)

The magazine release is reversible and the dustcover features a five-­slot Picatinny-spec rail. The slide lock/release levers are ambidextrous, small and well placed for access on either side by most hands. The triggerguard is large and suitable for gloved hands. The trigger is SIG Sauer’s successful X-­series flat-faced unit. As of this writing, black is the only available frame color. 

gaad-ph-sig-p320-xten-07-1200x800
The front of the triggerguard offers a serrated touchpoint for those who like to grip it with the support-hand’s index finger. (Photo by Mark Fingar)

The black Nitron-finished slide is stainless steel. It features the typical SIG Sauer grasping grooves at the front and rear. The coating was even, smooth and effective. Guns & Ammo’s editorial staff shot the pistol in an unusual summer storm and put it away wet. We retrieved it a week later to finish testing and found no evidence of rust. The slide is topped with the brand’s X-­RAY3 day/night sights. It is optic compatible for a wide variety of dot sights, too. The slide houses a 5-­inch, carbon-steel, Nitron-coated bull barrel.

gaad-ph-sig-p320-xten-08-1200x800
X-Ray3 day/night sights sit in SIG Sauer-pattern dovetails on the XTen slide. Grasping grooves, i.e., slide serrations, are not deep but they are tactile enough to assist with slide manipulations. (Photo by Mark Fingar)

For testing, the new SIG Sauer Romeo2 red-dot sight was mounted to the slide to extract the pistol’s accuracy potential. The Romeo2 is SIG Sauer’s newest pistol-­focused electro-­optic. It features a 3 MOA red dot, rubberized buttons on the left side to adjust the intensity through 15 levels — 12 visible and three night vision, a side-loading tray for the CR2032 battery and click-adjustable slot head screws for windage and elevation. The Romeo2 is unique in that it can be user modified from an exposed-emitter optic to a closed emitter. It’s a clever system that features two additional component parts, a rear window and an outer shell that attaches to the optic body. To change it, the shooter simply places the rear window in a ledge to the rear of the optic body. The window is wedge shaped in profile, which allows it to rest against the rear edge of the optic window. The rear window is polycarbonate and has a gasket around the areas where it contacts the optic body. The shooter then hooks the crossbar of the steel outer shell in a notch at the front of the optic body and rotates it down into place, like a hinge. The outer shell traps the window, allowing the gasket to make a seal. The user then fixes it into place on each side using the provided T6 fasteners. It’s easy to convert and a very secure system. G&A tested it with several 3-­meter drops over concrete and rocks. Some also used the optic body to rack the slide off a wooden barricade. It was scratched and dinged, but it never failed. Battery life is advertised at 25,000 hours, helped by the unit’s motion-activated sensor.

gaad-ph-sig-p320-xten-09-1200x800
The SIG Sauer Romeo2 was the optic used to test the XTen for accuracy tests. The 3 MOA red dot dominates the user’s attention. It is adjustable between 15 levels of brightness. (Photo by Mark Fingar)

With the Romeo2 mounted, the XTen proved itself even better on the range through multiple sessions. We put some 600 rounds of mixed ball and hollowpoint ammunition through it for its initial testing. At approximately round 60 there was a failure for a round to go into battery, but it was a malfunction that never repeated itself. No other malfunctions were noted. 

The XTen ships with two 15-­round magazines, and while the first 14 rounds were easy to load, the last one was tough. The combination of the beveled magazine well and the steel, double-stack magazines did make for easy reloading, and the expended magazines ejected easily.

gaad-ph-sig-p320-xten-10-1200x800
The 5-inch barrel features a subtle 11-degree crown, which protects the rifling for accurate shooting. The dustcover wears a generous rail for attaching a light or laser accessories. (Photo by Mark Fingar)

Shooting the XTen is unique. The shooters used to bigger calibers found the ergonomics of the pistol helped mitigate the felt recoil. For an experienced shooter, the XTen is among the easier of the 10mm pistols on the market. The X-­series grip and texture were positive contributors. The heft and balance of the big pistol also made it easier to transition between targets. If you are an inexperienced shooter used to 9mm recoil, there will be an adjustment period.

The combination of the 5-­inch barrel, the Romeo2 optic, and the 4-­pound, 4-­ounce-measured flat-face trigger supported the XTen in producing some impressive accuracy. Most groups were smaller than 2 inches. SIG Sauer’s 180-grain V-­Crown was the most accurate load tested — with a 1.6-­inch average! G&A has reported on 10mm M1911A1s costing more than $2,000 that did not shoot as well.

gaad-ph-sig-p320-xten-11-1200x800
Two 15-round magazines are included with the XTen. Both fed reliably during G&A’s evaluation and ejected without issue from the funnelled magazine well. (Photo by Mark Fingar)

While the case for needing a 10mm for carry might not be common, the case for wanting a 10mm is. With a $799 retail price, the P320-XTen represents a potent combination of performance and value. Imagine if we had this pistol available when the 10mm was introduced in the 1980s! 

Recommended


SIG Sauer P320-XTen

  • Type: Striker fired, recoil operated, semiautomatic
  • Cartridge: 10mm
  • Capacity: 15+1 ­rds.
  • Barrel: 5 in.
  • Overall Length: 8.5 in.
  • Weight: 2 lb., 1 oz.
  • Sights: SIG Sauer X-Ray3 Day/Night; optic ready
  • Finish: Nitride (steel)
  • Trigger: 4 lbs., 4 oz. (tested), flat
  • MSRP: $799
  • Manufactuerer: SIG Sauer, 603-610-3000, sigsauer.com
gaad-ph-sig-p320-xten-12-1200x800
(Guns & Ammo photo)



Current Magazine Cover

Enjoy articles like this?

Subscribe to the magazine.

Get access to everything Guns & Ammo has to offer.
Subscribe to the Magazine

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Recommended Articles

Recent Videos

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Optics

HIVIZ FastDot H3 Handgun Sights

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Optics

Meprolight's M22 Dual-Illumination No Batteries Reflex Sight: Video Review

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Other

Ballistic Advantage Continues Excellence in Barrel Design

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Rifles

Winchester Ranger Returns! Now In .22

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Rifles

Latest Name In Lever Guns: Aero Precision

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Rifles

SAKO 90 Quest Lightweight Hunting Rifle

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Optics

Warne Scope Mounts New Red Dot Risers

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Accessories

New Warne Scope Mounts Skyline Lite Bipods

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Handguns

Smith & Wesson Response PCC: Now Taking SIG Mags

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Optics

Mark 4HD Riflescopes: The Latest Tactical Line From Leupold

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Rifles

Show Stopper: Smith & Wesson 1854 Lever-Action Rifle

Its seems like every year is a busy year FN, and 2024 is no different. Joe Kurtenbach is joined by Chris Johnson and Ric...
Suppressors

FN 509 Pistol Updates and New Suppressors!

Guns and Ammo Magazine Covers Print and Tablet Versions

GET THE MAGAZINE Subscribe & Save

Digital Now Included!

SUBSCRIBE NOW

Give a Gift   |   Subscriber Services

PREVIEW THIS MONTH'S ISSUE

Buy Digital Single Issues

Magazine App Logo

Don't miss an issue.
Buy single digital issue for your phone or tablet.

Buy Single Digital Issue on the Guns & Ammo App

Other Magazines

See All Other Magazines

Special Interest Magazines

See All Special Interest Magazines

GET THE NEWSLETTER Join the List and Never Miss a Thing.

Get the top Guns & Ammo stories delivered right to your inbox every week.

Phone Icon

Get Digital Access.

All Guns and Ammo subscribers now have digital access to their magazine content. This means you have the option to read your magazine on most popular phones and tablets.

To get started, click the link below to visit mymagnow.com and learn how to access your digital magazine.

Get Digital Access

Not a Subscriber?
Subscribe Now

Enjoying What You're Reading?

Get a Full Year
of Guns & Ammo
& Digital Access.

Offer only for new subscribers.

Subscribe Now