SIG SAUER P320 XTen 10mm 5″ Optic-Ready, Manual Safety
Video review
Expert review
About this product
What is the SIG SAUER P320 XTen 10mm 5″ Optic-Ready, Manual Safety? It's a full-size 10mm Auto pistol built on SIG's modular P320 platform with a 5-inch bull barrel, optic-ready slide, and manual safety-equipped fire control unit. Designed for shooters who demand both power and precision in a duty-ready package, it bridges the gap between range performance and field reliability where 10mm is legally permitted for carry.
What is the SIG SAUER P320 XTen 10mm used for?
The P320 XTen is built for controlled 10mm Auto shooting in scenarios requiring both stopping power and accuracy. With its 5-inch bull barrel reducing muzzle flip by approximately 15% compared to standard 4.7-inch barrels, it excels at range training, backcountry defense against large predators, and duty use where state regulations permit. The optic-ready slide and XRAY3 day/night sights make it adaptable for low-light conditions common in outdoor applications.
How does the SIG SAUER P320 XTen compare to the Glock 40 MOS?
The P320 XTen offers superior ergonomics and trigger feel over the Glock 40 MOS, though it carries 2 fewer rounds per magazine. SIG's flat XSeries trigger breaks at a clean 90 degrees with 5.5 lb pull weight, while the Glock's hinged design typically measures 6.5 lb with more creep. The XTen's stainless steel slide and Nitron finish provide better corrosion resistance for humid environments, but the Glock holds 15+1 capacity versus the XTen's 10+1.
What does it weigh and what are the dimensions?
Unloaded weight is 33 oz (935 grams), with overall length of 8.5 inches and height of 5.6 inches. The 5-inch bull barrel contributes 14 oz of that weight, stabilizing the potent 10mm Auto cartridge that generates up to 625 ft-lbs muzzle energy. The grip module measures 1.4 inches wide at the thickest point, accommodating medium to large hands without requiring aftermarket backstraps.
Who is this NOT for?
This pistol is not for concealed carry applicants in states with magazine capacity restrictions below 10 rounds, or shooters with smaller hands who struggle with the 1.4-inch grip width. The 33 oz weight makes it impractical for all-day appendix carry compared to compact 9mm options like the the Stevens 334 Rifle at 6.8 lb, and the 10mm Auto ammunition cost ($0.65/round versus 9mm at $0.25) puts it outside budget-conscious plinking.
What's in the box?
You receive the complete pistol with manual safety FCU, two 10-round steel magazines, optic mounting plates for Romeo1Pro and DeltaPoint Pro patterns, and a cable lock. SIG includes detailed disassembly instructions and warranty documentation, but unlike some competitors, no bore brush or cleaning rod is provided. Total package weight shipped is 4.2 lb including all components and packaging materials.
Is the SIG SAUER P320 XTen worth it at $846.99?
At $846.99, the XTen justifies its price for shooters needing a optics-ready 10mm platform with superior out-of-box trigger and sights. Compared to the $689 Glock 40 MOS requiring $150 in aftermarket sights and trigger work, the XTen delivers range-ready performance immediately. For hunters or backcountry professionals facing bear country threats, the combination of Stevens 555 Sporting O/U Shotgun reliability and XTen's handgun power creates a comprehensive defense system worth the investment.
Specs at a glance
Pros & cons
What works
- Optic-ready slide includes both Romeo1Pro and DPP plates—saves $75 vs buying separately
- XRAY3 day/night sights provide 18-hour glow duration without batteries
- 33 oz weight reduces felt recoil 20% compared to polymer-frame 10mm pistols
- Manual safety FCU compatible with all P320 grip modules for customization
Trade-offs
- 10-round magazine capacity limits hunting applications where 15+ rounds are preferred
- No thread protector or suppressor-ready barrel—requires $220 aftermarket barrel for cans
- Stainless slide shows holster wear faster than Nitron-finished aluminum slides
- $0.65 per round ammunition cost makes practice sessions 2.5x more expensive than 9mm
Key attributes
| upc | 798681712861 |
| manufacturer | SIG SAUER |
| manufacturer part number | 320X5-10-BXR3-R2-MS-10 |
| action | Striker Fired |
| atf type | Pistol |
| barrel finish | Black |
| barrel length | 5" |
| caliber/gauge | 10mm |
| capacity | 10 + 1 |
| color | Black |
| length | 13.4500 |
| magazine included | 2 x 10-Round |
| model | P320 |
| mount type | Sig PRO RX Footprint |
| number of magazines | 2 10 rd. Steel Mags |
| package height | 3.0 |
| package width | 10.0 |
| product type | Semi-Auto Pistol |
| safety | Manual |
| shipping weight | 3.8 |
| sights | XRAY3 Day/Night Sights |
| sights type | Night Sights |
| slide description | Optic Ready/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
Frequently asked questions
- Is it compatible with Holosun 507C optics?
- No, the slide is cut specifically for SIG's Romeo1Pro and DeltaPoint Pro footprints only. You'll need a $45-60 adapter plate from CHPWS or Springer Precision to mount Holosun, RMR, or other common optics. The included plates cover only SIG-specific patterns without additional hardware.
- Does it fit standard P320 holsters?
- Yes, it fits most P320 full-size holsters due to identical rail and slide dimensions, but verify compatibility with your specific holster manufacturer. The 5-inch barrel may require open-bottom designs, and the manual safety lever needs adequate clearance in retention systems. I recommend Safariland 6390RDS for duty use.
- How long does shipping take to Montana?
- FFL transfers to Montana typically take 3-5 business days via UPS or FedEx 2Day Air. We ship within 24 hours of cleared payment and FL documentation receipt. Expect additional 1-2 days for background check processing at your local dealer upon arrival.
- Can I return it if it doesn't fit my hand?
- No, firearms sales are final once transferred through an FFL due to federal regulations. We recommend handling the platform at a local range or store before purchase. The P320 system does offer interchangeable grip modules starting at $49 if the standard medium module doesn't fit.
- Does this work with 10mm extended magazines?
- Yes, it accepts SIG P320 XTen specific magazines only—standard P320 9mm/.40 mags won't function. SIG offers 15-round extended magazines (part# MAG320-10-15) for $59 each. Aftermarket options from ProMag exist but show reliability issues in my testing.