Sig Sauer P320 XTEN Endure 10mm 5in (3)15rd
Pros & cons
What works
- Three 15-rd magazines included—$180 value versus separate purchase
- Cerakote finish survives 300-hour salt spray testing—5x better than standard finishes
- X-RAY3 sights provide 8-hour glow duration after 10-minute light exposure
- 5-inch bull barrel maintains 2.5-inch groups at 25 yards with factory ammo
Trade-offs
- 33 oz weight requires reinforced duty holsters—adds $75-150 to setup cost
- 10mm ammunition costs $0.60/round versus 9mm at $0.25—doubles practice expenses
- No threaded barrel option—suppressor users must seek aftermarket $250 conversion
Video review
Expert review
Specs at a glance
About this product
The Sig Sauer P320 XTEN Endure 10mm 5in is a full-size duty pistol engineered for extreme environmental conditions with three 15-round magazines. As the first firearm in SIG Custom Works' ENDURE series, it features corrosion-resistant Cerakote finishing and aggressive grip texturing designed specifically for wet-hand scenarios. This 33-ounce platform represents Sig's answer to the growing demand for reliable 10mm handguns in backcountry protection roles.
What is the Sig Sauer P320 XTEN Endure used for?
This pistol serves as primary protection for backcountry professionals and recreational shooters operating in harsh environments. The 10mm cartridge delivers 650 ft-lbs of muzzle energy—nearly double the 9mm's energy—making it effective against large predators encountered in remote areas. Its 5-inch bull barrel provides consistent accuracy for both defensive scenarios and extended range sessions.
How does the P320 XTEN Endure compare to the Glock 20?
The XTEN Endure offers superior ergonomics and optic readiness compared to the standard Glock 20 Gen5. While the Glock maintains its reputation for reliability, the Sig's X-Series flat trigger provides a cleaner 5.5-pound break versus the Glock's 6-pound spongier pull. The Endure's Cerakote finish also provides better corrosion resistance than the Glock's standard nDLC coating when exposed to salt spray testing.
What does it weigh and what are the dimensions?
The unloaded weight measures 33 ounces while the overall length spans 8.5 inches—making it comparable in size to competition pistols like the Stevens 334 Rifle in handling characteristics. The 5-inch cold hammer-forged barrel contributes significantly to the weapon's balance, with slide width measuring exactly 1.4 inches for comfortable holster compatibility.
Who is this NOT for?
This isn't for concealed carry applicants or shooters sensitive to recoil management challenges. The 10mm generates approximately 40% more recoil energy than 9mm equivalents, requiring dedicated practice to master. Urban dwellers would better appreciate our Stevens 555 Sporting shotgun for home defense scenarios where over-penetration concerns exist.
What's in the box?
You receive the complete pistol with three 15-round steel magazines—a $180 value if purchased separately. SIG includes X-RAY3 day/night sights pre-installed and all necessary documentation for warranty registration. The case also contains a cable lock meeting California DOJ requirements and optic mounting screws for popular red dot footprints.
Is the P320 XTEN Endure worth it at $1038.99?
At this price point, the Endure justifies its premium through genuine duty-grade components rather than cosmetic upgrades. Compared to standard P320 models costing $200 less, you're paying for the corrosion-resistant Cerakote application, enhanced grip module, and additional magazines that would cost $400 separately. For serious outdoorsmen needing reliable performance in adverse conditions, this represents appropriate value.
Key attributes
| upc | 798681690336 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320X5-10-CXR3-CW-R2 |
| action | Semi-Auto |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 5'' |
| caliber/gauge | 10mm |
| capacity | 15+1-Round |
| color | Tan |
| length | 8.5'' |
| magazine included | 3 x 15-Round |
| model | P320 XTEN |
| number of magazines | 3 |
| package height | 2.8 |
| package width | 9.4 |
| product type | Striker Fired |
| safety | Thumb |
| shipping weight | 4.4 |
| sights | XRAY3 Day/Night Sights |
| sights type | Night Sights |
| slide description | Optic Ready/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is it compatible with standard P320 holsters?
- No, the 5-inch slide and XTEN frame dimensions require specialized holsters. Safariland 7390 RDS models with SureFire X300 light attachments provide the best retention fit. Standard P320 full-size holsters will have approximately 0.8 inches of excess length at the muzzle end.
- Does it fit Trijicon RMR optics directly?
- Yes, the slide comes cut for the Sig Sauer Romeo2/Romeo3 footprint which accepts RMR plates. Installation requires purchasing Sig's $45 adapter plate and using the provided 6-32 mounting screws. Zero retention remains consistent through 500-round testing cycles.
- How long does shipping take to Montana?
- FFL transfers to Montana average 7 business days via FedEx Priority Overnight. We initiate background checks within 2 hours of FFL confirmation receipt. Rural deliveries may require 1-2 additional days depending on local courier schedules.
- Can I return it if the grip doesn't fit my hand?
- Firearms sales are final once the background check completes per ATF regulations. We recommend handling the standard P320 X-Ten at local dealers before purchasing. The LXG grip module measures 1.38 inches across the backstrap—compare against your Glock 20's 1.34-inch circumference.
- Does this work with aftermarket P320 trigger kits?
- Most drop-in kits function properly but void Sig's lifetime warranty. The Armory Craft Dual Adjustable Trigger requires 15 minutes for installation and reduces pull weight to 3.5 pounds. Test all modifications with 200 rounds of full-power Underwood Ammo before carrying defensively.