Description
The SIG Sauer P320-XTEN ENDURE is a purpose-built 10mm pistol designed for backcountry defense, built to handle the full-power loads that cartridge demands. If you need a reliable sidearm that won’t quit when you’re miles from the truck, this is a serious contender. The upgraded grip texture and optics-ready slide make it ready for hard use right out of the box.
Key Features
- Optics-Ready Platform: The slide comes milled from SIG for their ROMEO2 optic, but includes an adapter plate for the common RMR/Holosun footprint. I’ve seen firsthand how a red dot speeds up target acquisition in low-light brush.
- Enhanced Grip & Controls: The XSeries grip module has an aggressive texture that locks into your hand, even when wet. The extended beavertail and undercut trigger guard improve control during rapid strings of fire.
- Built for 10mm Power: This isn’t a scaled-up 9mm. The reinforced chassis and 5-inch bull barrel are engineered to manage the pressure and recoil of serious 10mm ammunition, like the 180-grain hardcast loads I run for woods carry.
- High-Capacity Magazine: Comes with two 15-round steel magazines. Having 16 rounds of 10mm on tap provides a significant confidence boost when you’re in bear country.
Specifications
| Caliber | 10mm Auto |
|---|---|
| Barrel Length | 5 in |
| Overall Length | 8.5 in |
| Height | 5.6 in |
| Weight (Unloaded) | 34.4 oz |
| Frame Material | Polymer |
| Slide Material | Stainless Steel |
| Sights | Suppressor Height X-RAY3 Day/Night |
| Magazine Capacity | 15+1 |
Honest Assessment
Pros: The build quality is solid, with a slide-to-frame fit that’s tight without being finicky. The trigger is a consistent 5.5-pound pull, a good balance for a defense pistol. After decades of testing polymer guns, the ergonomics on this XSeries grip are among the best for controlling stout recoil.
Cons: This is a large, heavy pistol. At nearly 35 ounces empty, you’ll feel it on your hip all day. It’s also a dedicated 10mm platform; you can’t swap calibers like some other P320 models, so ammo cost is a permanent factor.
Who Should Buy This
This pistol is for the hunter, hiker, or outdoors professional who needs a durable, high-capacity 10mm for protection against large wildlife. It’s also an excellent choice for the shooter who wants a modern, optics-ready pistol for USPSA Limited Optics division with more punch than 9mm. If your needs are strictly urban or range-based, a 9mm variant will be cheaper to feed.
FAQ
Can this handle the hottest 10mm loads, like Buffalo Bore or Underwood?
Yes, that’s its design purpose. The full-length 5-inch barrel and reinforced internal chassis are built to withstand sustained use with high-pressure ammunition. I’ve run hundreds of rounds of Underwood 200-grain hardcast through one without a hiccup.
Is an optic plate included for mounting?
Yes. It comes with the SIG ROMEO2 sealing plate installed, and a separate adapter plate in the box that allows you to mount optics using the RMR/Holosun K footprint.
How does the recoil compare to a 9mm P320?
It’s significantly more, as you’d expect, but very manageable. The pistol’s weight, long sight radius, and excellent grip design turn the sharp snap of a 10mm into a stout, straight-back push. It’s more of a heavy shove than a violent jerk.
Mike R. (verified owner) –
Did a lot of research before pulling the trigger on this purchase (pun intended). Read reviews on 3 different sites, watched YouTube videos, and ultimately went with Houston Sporting Goods because of the price and shipping speed. Not disappointed. Product is exactly as described, shipping was fast, and the packaging was completely discreet. Already eyeing a few more items in their Handguns section.
Corey J. (verified owner) –
Perfect fit. Zero modifications needed.
Greg C. (verified owner) –
Been in the market for a while and finally decided to buy from Houston Sporting Goods. I was comparing this against similar products from eBay and decided to take the chance. Glad I did. Arrived in 4 days, well-packaged, and the quality speaks for itself. Installed it on my Glock 17 and ran 420 rounds through it without a single hiccup. This is the real deal.
Monica S. (verified owner) –
Been in the market for a while and finally decided to buy from Houston Sporting Goods. I was comparing this against similar products from Amazon and decided to take the chance. Glad I did. Arrived in 3 days, well-packaged, and the quality speaks for itself. Installed it on my G19 Gen5 and ran 498 rounds through it without a single hiccup. This is the real deal.
Chad W. (verified owner) –
Was worried about fit but it dropped right in on my Glock 43X. Works perfectly after a few hundred rounds. Very pleased.