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Sig Sauer P320-XTEN 10mm Pistol Review: Too Hot to Handle?

We take the new Sig Sauer P320-XTen 10mm pistol to the range to see how it does. Should you take this on your next hunt or hike? Come find out.

The Sig Sauer P320 has been around for almost a decade, and a lot of folks, professional and otherwise, have been shooting versions of it ever since.

Recently, the lineup got an exciting bolster with the addition of the new P320-XTEN…in 10mm.

We can agree Sig has an established track record with the P320 series of guns, but when they converted the gun to a big boy 10mm, did they bite off more than they could chew?

Whole lotta love

We scoured the web and called in favors to assemble ammunition just so we could answer that very question.

So, stick with us as we look at the P320-XTEN, talk about some pros and cons, and take it to the range!

Table of Contents

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Pros & Cons

Pros

  • 10mm
  • Good ergonomics
  • Well balanced

Cons

  • Recoil
  • Ammo scarcity

The Bottom Line

The XTEN is a natural evolution of the P320 line into 10mm. Sig applied their know-how when scaling the platform up, so the end result is an accurate shooter that isn’t too much to handle. 

Big booms

Specs & Features

Specs

  • Caliber: 10mm
  • Width: 1.3”
  • Length: 8.5”
  • Barrel Length: 5”
  • Height: 5.6”
  • Weight: 33 oz.
  • Capacity: 15+1

Features

  • Optics ready
  • 5” bull barrel
  • New 10mm/.45 grip module

Source: Sig Sauer P320 XTEN

Available Coupons

Background

When Sig Sauer released the P320 back in 2014, there was much fanfare due to the modularity of the system. Several variants followed, with different models and calibers marching in lockstep.

Accolades for the gun were awarded, and in 2017, Sig won the U.S. Army’s Modular Handgun System competition.

The M17 is a formidable weapon designed to operate in the military theater
P320-M17

But it took until 2022 before a dedicated 10mm came to market.

(Want to see more P320 models, check out our guide here!)

Who Is It For?

One could argue that 10mm is the best millimeter, but it really depends on the intended use. Because the round produces so much energy, touching one off is an experience and should be approached accordingly.

The defensive scenario applicability of the XTEN is somewhat limited because of the 10mm quandary — with great power comes great responsibility.

The anticipation is real.

This is not a CCW you’ll want to unleash in a densely populated situation.

The XTEN does a great job of delivering accurate fire, but it is a full-sized gun and develops a lot of energy.

Home defense in a rural area? You bet. Hunting or fishing in bear country? Perfect!

Fit & Feel

The modularity is still prominently featured in the XTEN, but the grip module has been somewhat altered from previous versions.

Capable of fitting .45 and 10mm, the grip is both thin and well-shaped, with a generous beaver tail, allowing big and small hands comfortable purchase.

Grip texture is aggressive, just like it needs to be, and all these features combine nicely to help shooters tame the recoil the 10mm produces.

Good angles and great texture

The slide comes with fore and aft serrations. This is a bigger gun, with an overall length of 8.5 inches that weighs in at just over 2 pounds. Despite this, it feels well-balanced.

The trigger is a flat-shoed model that angled forward slightly. I noticed a defined wall after a short build-up, which then broke crisply just under 4 pounds on my Lyman digital gauge.

Reset occurred quickly and was both audible and tactile. The trigger is a solid example of what can be done with a striker-fired weapon.

Make sure to add a hearty optic, 10mm is no joke

The XTEN comes standard with X-Ray 3 night sights, and these were good, but I paid little if any attention to them after mounting the Romeo 2 on the gun.

This slice of beefcake was a delight and made initial and follow-up shots a breeze.

The 15-round magazines were sturdy, loaded easily, and secured in the gun solidly. They also dropped cleanly each time.

How Does It Shoot?

This is an area that requires much on the shooter’s part. The 10mm is significant, not Smith & Wesson 500 significant…but the recoil will likely be more than most are used to.

As a result, you might find yourself anticipating that recoil more, bracing against it, and pulling your shots down as a result.

You may even drop shots by jerking the trigger.

I did these things and had to remind myself to focus on good fundamentals in order to shoot accurately. This accomplished, the XTEN shot extremely well.

I was able to put together some 3-shot groups that were around one inch at 7 yards.

What Sets it Apart?

The XTEN felt very familiar based on my experience with other P320 models though the main difference was the recoil.

While it’s not unmanageable, it does take some getting used to.

The Romeo 2 comes with multiple hood options

The frame design and features are the secrets to success in handling the muzzle flip.

By The Numbers

Reliability: 5/5

During testing, we fired a few hundred rounds of Sig Performance 180-grain FMJ as well as some 60-grain, barn burning (2,400 FPS) hollow point called Civil Defense from Liberty Ammunition. All fed, fired, and cleared with zero malfunctions though what the Liberty ammo did to a worthy test pineapple was anything but civil.

Ergonomics: 5/5

Fitting both large and smaller hands, Sig did an excellent job of hitting the middle ground with the grip. This was crucial because otherwise, the gun’s recoil would be more difficult to master. All controls were easy to reach, and the magazine and slide release are both ambidextrous.

Accuracy: 5/5

Once you get beyond the muzzle flip and focus on fundamentals, the 5-inch bull barrel does a great job of putting together accurate shots.

Customization: 4/5

On one hand, the P320 alone is very customizable though size will dictate the XTEN only being comparable with .45 swap-out options. In addition, being optics ready, you can mount a Romeo 2 or Trijicon RMR on top, but don’t scrimp here as the 10mm will eat up less sturdy red dots.

There is also a Picatinny rail up front to add your favorite accessories. On Sig’s website, the only 10mm accessory for sale was a magazine, and they were out of stock.

Value: 4/5

Current pricing should be around $799, and that’s a bit high, but when you consider you’re getting a modular, full-sized gun that has night sights and is optics ready, it’s a good value. Shop around, though, prices are ranging between $600 and $1,200 if you can find them.

Overall: 4.5/5

Available Coupons

Upgrades for P320 XTEN

There will presumably be trigger upgrades and other accessories that will assist shooters with tooling up their XTEN down the road, but right now, the gun is a little too new.

Who knows? Maybe if popularity supports it, there might be other versions of this gun, like a Legion.

Final Verdict

The P320-XTEN was my first foray into 10mm, and I was very impressed. Having carried and shot .45 for years, the relative snap of the faster cartridge was a little surprising to my 9mm accustomed hands.

But after getting used to it, I was able to enjoy the big gun and see the merits of its use. Sig did a great job of scaling up the P320 to fit this mighty caliber.

I found the XTEN to be accurate and reliable, with great ergonomics, and it was not too much to handle. Notably, firing 9mm after shooting the XTEN seemed almost mundane.

Are you picking up an XTEN? Let us know in the comments below and for more 10mm action, be sure to check out our article Best 10mm Pistols & Handguns: Go Big or Go Home!

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19 Leave a Reply

  • Commenter Avatar
    Jonathan Jeffries

    I was lucky enough to get an Xten shortly after they were released. The gun is incredible and to date I have only shot about 300 rounds through it but have not had any issues. I have larger hands and this gun suits me great. Only problem is finding more magazines. And while the kick is obviously more than my X5 Legion 9mm, it is pretty.much what I expected.

    August 15, 2022 6:29 pm
  • Commenter Avatar
    Mike Stephens

    Love the 10mm! Glad I stocked up before the shortage. I shoot the Glock 40, 6" barrel, though I have a Kimber 1911 and S&W 610 as well. I mounted the Burris Optics FastFire 3 Reflex Sight - 8 MOA Dot and co-witness sights on the Glockzilla and it's now my favorite hunting handgun.

    August 15, 2022 11:34 am
  • Commenter Avatar
    Royk

    Any recommendations on which RMR to mount to this beauty. Of course it's impossible to find the Romeo2

    July 15, 2022 12:37 pm
  • Commenter Avatar
    907LEO

    I own several 10mms and send alot of 10mm downrange. I live in rural Alaska.

    I like the XTen, it shoots well. The ergos are pretty decent. My only beef with it, and it seems to be a common complaint around here, is that the grip module is too small. Actually kinda ticked off that Sig designed a TenMM with 9mm shooters in mind.

    The module size is less about the caliber for us, it's more to do with the fact that we don't have sissified office worker hands and the grip module is just too small.

    Hopefully Sig puts out a men's sized grip module for it soon.

    July 15, 2022 11:42 am
  • Commenter Avatar
    John D

    I am between this and the Springfield xdm 10mm. Can you do a review on that?

    July 8, 2022 8:48 am
    • Commenter Avatar
      Sean Curtis

      I can certainly reach out to them!

      July 10, 2022 1:47 pm
  • Commenter Avatar
    H.C.3

    If you have to put down a bunch of ravenous monkeys or tyrannical pigs you want a proper caliber to hold them off until you get to your real firepower. Namely belt fed artillery, drums of homemade napalm and explosion devices to make sure their ancestors remember your name;)

    July 7, 2022 5:39 pm
    • Commenter Avatar
      Sean Curtis

      Til Valhall!

      July 8, 2022 7:34 am
  • Commenter Avatar
    IPSC Guy

    Well if the 10mm is the best then 11.5 mm is “more bester”. How about 45 Super 165 gr JHP 1407 fps and 794 ft-lbs of energy, down to a 230 at 1154 and 694 ft-lbs.

    July 7, 2022 5:34 pm
    • Commenter Avatar
      Sean Curtis

      I've always been a Takeshi Kovacs fan and he loved him some 11mm. I'm down!

      July 8, 2022 7:35 am
  • Commenter Avatar
    .40 cal Booger

    I've got about 2,000 rounds of 10 mm. Of course bought it before the ammo shortage started.

    Anyway. My first sig was a P226 9 mm and shot the heck out of it. Still have it, liked it.

    Then I went to 10mm guns, been through a few but still have them.

    But still go back to my Glock 22 .40 S&W for EDC.

    Might give this Sig a look though.

    July 7, 2022 5:27 pm
    • Commenter Avatar
      Sean Curtis

      Well placed purchase!

      I love my P226 Legion, it's quite a shooter! You won't be disappointed with the XTEN, it's beefcake.

      July 8, 2022 7:37 am
  • Commenter Avatar
    Kurokawa

    Pushing a firearm with scant availability of ammunition is like trying to sell a vehicle that gets 100mpg fueled by ostrich eggs. Possible? Yes, but practical? Not so much.

    July 7, 2022 4:19 pm
    • Commenter Avatar
      Owen McCullen

      I know that 10 mm ammo is not readily available. But, I have generally found all I wanted or needed on the internet. There are several sources that reliably have some on hand. However, it is more expensive than lesser calibers.
      I do not agree with your analogy. It is like comparing apples and fruit salad. Cars are hardly the equivalent of pistols.
      Yes, it is difficult to find and one must make an effort. However, I have never done without. However, finding fresh ostrich eggs seems like it might be a more difficult quest. Perhaps not, since I haven't looked.
      By the way, where can I get one of those miracle vehicles that goes get 100 mpg on ostrich eggs? Given the price of gas, I might want to consider that.
      Anyway, thanks for the suggestion. You have given me something else to cogitate on instead of Biden's failings. My wife would also thank you as she is tired of my triads on Biden.

      July 7, 2022 8:11 pm
    • Commenter Avatar
      dsweeny

      Just bought a XDM elite osp in 10mm on July 2nd. Ordered ammo online and got impatient waiting to shoot it. Got up on July 5th after the holiday weekend and the first local gun shop I called had a "ton" of 180 gr ball ammo in stock with no purchase restrictions. No problem finding hollow points with two day delivery either. Where's the shortage?

      July 7, 2022 8:12 pm
      • Commenter Avatar
        Sean Curtis

        It's not as bad now and it's localized. When the pandemic first started, 10mm was one of the last things I saw sitting on the shelves at gun stores. In the spin up for this review, one of the companies I was working with to secure some 10mm was struggling to find some too but as John pointed out, buying smaller lots in different places helps.

        July 8, 2022 7:33 am
    • Commenter Avatar
      John

      10mm is available, just not in all the more common places that are popular for ammo purchases.. You just have to search harder for it on the internet.

      What many people do not realize that many of the small less popular purchase places on the internet had large quantity buys of ammo available in this shortage period. It's those small less popular purchase places on the internet you need to sesrch. Sure, you might need to buy it in lots of say, for example, 100 or 500 or 1000 rounds increments but it is there.

      During this shortage I've been able to buy multiple lots of 100 rounds of 5.56 and over all thousands of rounds doing so with no problem at all while others were complaining about 5.56 not being available. Same with other calibers.

      July 8, 2022 6:57 am
      • Commenter Avatar
        Sean Curtis

        Great tip John, thank you!

        July 8, 2022 7:26 am
    • Commenter Avatar
      Sean Curtis

      Seems like I hit a pocket in the lead up to this article, but it's not nearly as grim as all that. Thanks to the readers, we have some different options to find that glorious 10mm.

      July 8, 2022 7:38 am
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