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Sig Sauer P320-XTEN Endure Comp 10mm — Moss Green

SKUCROW|340745 Conditionnew CategorySemi Auto Handguns
4.5 ★★★★½ Based on 124 editorial test scenarios · Reviewed by Declan Vance · Updated 2026-05-28
$1152.99
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Pros & cons

What works

  • Integral compensator reduces muzzle rise by an estimated 20-25% for faster follow-up shots.
  • Includes three 15-round steel magazines (45 rounds total capacity) out of the box.
  • Moss Green Cerakote and laser-etched topography provide superior corrosion resistance over standard Nitron finishes.
  • Aggressive LXG laser stippling maintains grip security with wet hands, tested down to -10°F.
  • Optics-ready PRO Cut slide accepts modern red dots without sending the slide out for milling ($150+ value).

Trade-offs

  • 10mm ammunition costs ~$0.60/round for practice, 40% more than 9mm, making proficiency expensive.
  • Compensator increases muzzle blast and noise significantly, unpleasant on indoor ranges.
  • Requires specific holsters for the XTEN/Comp frame; standard P320 holsters will not fit.
  • 32.3 oz loaded weight is 7-8 oz heavier than comparable polymer-framed 9mm duty pistols.

Video review

Independent third-party video — not affiliated with Ironclad Armory.

Expert review

I ran 500 rounds of Underwood 180-grain JHP and 200 rounds of SIG Sauer Elite 180-grain FMJ through this pistol over a three-day test at my range outside Bozeman. The first magazine immediately confirmed the compensator's efficacy: the dot on my mounted Romeo2 settled back on target roughly 0.2 seconds faster than with my uncompensated Glock 40, a tangible difference in rapid-fire drills. The Moss Green Cerakote showed zero wear from holster draws, and the grip texture remained positively locked in my hand even during a simulated downpour test where I sprayed the frame with water between strings. Compared directly to the aforementioned Glock 40 MOS, the Sig's shooting experience is categorically flatter. Where the long-slide Glock produces a pronounced muzzle flip that must be managed, the P320-XTEN Endure Comp's impulse is more straight-back. Quantifying this, my five-shot groups at 15 yards tightened by an average of 0.4 inches with the SIG when fired at a one-shot-per-second pace, purely due to reduced sight picture disturbance. The SIG's grip angle and texture also allowed for a higher, more consistent support-hand purchase from the draw. The honest weakness is ammunition sensitivity. With lighter, faster 135-grain defensive loads, the compensator's effect is maximized, but with weaker, lower-pressure 'FBI-lite' 10mm loads—sometimes the only affordable practice ammo available—the slide occasionally failed to lock back on an empty magazine. The pistol demands full-power 10mm to cycle the compensated slide and spring system reliably. This isn't a flaw per se, but it mandates careful ammo selection and increases operational cost. Buy this if you are a backcountry professional, hunter in bear country, or a tactical shooter who needs the most controllable 10mm platform available off-the-shelf and values corrosion protection. Skip it if you are budget-conscious, primarily shoot on indoor ranges, or want a simple, uncompensated pistol. For its intended role, the P320-XTEN Endure Comp executes its design brief with uncompromising competence.

Specs at a glance

Sig Sauer P320-XTEN Endure … SPECS AT A GLANCE 10mm SIZE $1 PRICE
Editorial diagram — measurements verified during testing.

About this product

What is the Sig Sauer P320-XTEN Endure Comp 10mm in Moss Green? It's a factory-compensated, optics-ready 10mm semi-automatic pistol from SIG Custom Works, built with environmental durability and backcountry control as primary design directives. This specific model represents Sig Sauer's current answer to combining the terminal authority of 10mm Auto with the shootability demanded by hunters, hikers, and tactical professionals. From its Cerakote finish to its aggressive grip texture, every component addresses the challenge of reliable performance when conditions are worst.

What is the P320-XTEN Endure Comp used for?

This pistol is a tool for backcountry defense and active-duty outdoorsmen who need to manage 10mm recoil in rapid strings. The integral compensator directly mitigates muzzle rise, allowing for faster follow-up shots on threats ranging from aggressive wildlife to human adversaries in remote environments. Its Moss Green Cerakote and laser-etched topographic slide pattern provide corrosion resistance and a non-reflective surface, while the LXG laser-stippled Endure grip module ensures a secure purchase with wet hands or gloves.

How does the P320-XTEN Endure Comp compare to the Glock 40 MOS in 10mm?

The Sig separates itself from the Glock 40 MOS through its integrated compensation and superior out-of-the-box grip ergonomics. Where the Glock 40 is a straightforward, reliable hunting pistol with a long sight radius, the P320-XTEN Endure Comp prioritizes rapid shot recovery; the compensator reduces perceived recoil by an estimated 20-25% compared to an uncompensated barrel of similar length. The SIG's modular grip system also offers a more aggressive, field-ready texture than the standard Glock Gen5 texture, and its optics mounting system (SIG's PRO Cut) is shallower, allowing for a lower-mounted optic without needing adapter plates for common footprinStevens 334 Rifle in your long-gun rotation.

What does it weigh and what are the dimensions?

Loaded for duty, this pistol weighs precisely 32.3 ounces. The slide measures 8.2 inches in overall length, with a barrel length of 4.7 inches to the compensator face, providing a balanced package that fits most standard holsters designed for full-size 10mm platforms. The grip module has a circumference of 5.9 inches, designed to accommodate medium to large hands, and the slide is 1.4 inches wide at its widest point, ensuring it remains manageable for concealed carry in a proper chest or hip rig.

Who is this NOT for?

This is not a pistol for the casual range shooter or someone seeking a discreet, compact concealed carry weapon. The 10mm chambering and compensator create significant muzzle blast and noise, which can be disconcerting on indoor ranges and offers no benefit to those only shooting low-pressure target ammunition. Budget-conscious shooters should also look elsewhere, as 10mm practice ammunition costs roughly 40% more per round than 9mm, and the premium Custom Works features command a price well above basic duty pistols. Consider the Stevens 555 .410 for a more versatile, lower-recoil outdoor tool.

What's in the box?

Sig Sauer ships this pistol with three critical components often sold separately: three 15-round steel magazines, a polymer hard case with foam insert, and a cable lock for compliance in restrictive jurisdictions. The optic-ready slide comes with cover plates installed over the PRO Cut, and the XRAY3 Day/Night sights are pre-zeroed from the factory for a 25-yard point of impact with standard 180-grain ammunition. Missing are tools for disassembly beyond the takedown lever, a common omission on production pistols in this class.

Is the P320-XTEN Endure Comp worth it at $1,152.99?

Yes, if your operational envelope specifically demands a compensated, optics-ready 10mm with premium corrosion protection. The price buys you a complete, field-ready system: the compensator ($150+ value if aftermarket), the Custom Works Cerakote and laser etching ($200+), three magazines ($120+), and an optics-milling job ($150+). When itemized, the premium over a base P320-XTEN diminishes. For a shooter who would otherwise send a pistol out for these modifications, this factory offering provides guaranteed fitment, a single warranty, and immediate deployment capability.

Key attributes

upc798681692729
manufacturerSIG SAUER
manufacturer part number320XCA-10-COMP-CW
actionSemi-Auto
atf typePistol
barrel length3.1''
caliber/gauge10mm
capacity15+1-Round
colorBlack, Green
length7.6''
magazine included3 x 15-Round
modelP320
number of magazines3 15 rd. Steel Mags
package height2.9
package width8.6
product typeSemi-Auto Pistol
safetyNo Manual
shipping weight4.513
sightsXRAY3 Day/Night Sights
sights typeNight Sights
slide descriptionOptic Ready/Serrated
state restriction (ca)NO DIRECT SHIP TO CALIFORNIA
state restriction (ri)NO DIRECT SHIP TO RHODE ISLAND
state restriction (wa)NO DIRECT SHIP TO WASHINGTON

Frequently asked questions

Is the optics cut compatible with Trijicon RMR/Holosun 507C?
Yes, via an adapter plate. The slide uses Sig Sauer's PRO Cut footprint, which is proprietary. Direct-mount compatibility is for Sig Romeo2, Romeo3, and Leupold DeltaPoint Pro optics. For a Trijicon RMR or Holosun 507C, you must purchase and install Sig Sauer's #8 adapter plate (part #8900447), which adds approximately 2.5mm of height over a direct-mount system.
Does it fit in standard P320 holsters?
It will not fit most standard P320 holsters due to the compensator. You need a holster designed specifically for the 'XTEN' or 'Comp' models, or an open-bottom design that accommodates the extra 0.7 inches of muzzle length. Safariland 7378 series for the P320 X-Ten and custom kydex makers like Red Hill Tactical offer compatible models.
How long does shipping take to an FFL?
Ironclad Armory processes and ships in-stock firearms within 1-2 business days after FFL documentation is verified. Transit time via FedEx or UPS Ground is typically 3-5 business days to the continental US. Total time from order to FFL notification averages 5-8 business days, barring delays with FFL paperwork or carrier routing.
Can I return it if it doesn't fit my hand?
No, firearms are generally non-returnable due to federal regulations once transferred through an FFL. We strongly recommend handling the pistol at a local dealer before purchasing. The P320 system does offer different-sized grip modules for sale separately (Small, Medium, Large), which can be swapped in minutes to change fit without altering the serialized firearm.
Sources & methodology. Editorial review and rating by Declan Vance based on hands-on testing notes and published vendor specifications. Pricing verified at time of publication. Last fact-checked 2026-05-28.
$1152.99