Sig Sauer P320 Xten 10MM 5 Optic Ready XRAY3 2X15RD
Pros & cons
What works
- Genuine factory 10mm chambering in a familiar P320 platform
- Optic-ready slide with XRAY3 day/night sights standard
- Ships with two 15-round magazines
- More stopping power than 9mm for hunting or backcountry use
Trade-offs
- Larger and heavier than standard P320 9mm models
- 10mm ammunition costs more and is less widely available than 9mm
- California magazine-capacity compliance must be confirmed before ordering
Specs at a glance
About this product
The Sig Sauer P320-XTEN brings the power of 10mm Auto to Sig's modular P320 platform, giving shooters who want more stopping power or better performance against larger game and predators a factory 10mm option built on a proven, widely supported pistol system.
What are the P320-XTEN's core specs?
This full-size configuration runs a 5-inch bull barrel housed in an optic-ready slide, with XRAY3 day/night sights standard from the factory. It ships with two 15-round magazines (15+1 capacity), and overall dimensions come in at about 8.5 inches long, 5.6 inches tall, and 1.3 inches wide, with an unloaded weight (with magazine) of roughly 33 ounces. Sight radius is approximately 6.8 inches, aided by front and rear slide serrations for confident manipulation.
Why choose 10mm over 9mm or .45 ACP in a full-size P320?
10mm Auto delivers meaningfully more energy than 9mm and, depending on the load, can outperform .45 ACP in penetration and velocity, making it a popular choice for hunting, backcountry carry where larger predators are a concern, and shooters who simply want more power from a semi-auto platform. Because the P320-XTEN shares the same modular fire-control-unit design as other P320 variants, shooters already familiar with the P320 manual of arms get that same experience in a more powerful chambering.
Is the P320-XTEN a good choice for concealed carry or is it better suited to other uses?
At full size with a 5-inch barrel and 33-ounce weight, the P320-XTEN is sized more for open carry, backcountry/hiking carry, home defense, or range and hunting use than deep concealment. Its 15+1 capacity and optic-ready slide make it a versatile option for shooters who want a fighting-capacity 10mm rather than a small-frame backup gun.
Is the P320-XTEN legal to buy in California, and how does it ship?
California's handgun roster and magazine-capacity requirements apply per exact model, so confirm current California compliance and available magazine capacity for this specific P320-XTEN configuration with your FFL before ordering. As a firearm, it ships only to a licensed FFL dealer for transfer, background check, and any required waiting period.
What's included with this pistol?
This configuration ships with two 15-round magazines and factory XRAY3 day/night sights. No optic is included, though the slide is cut and ready for one.
How does the modular P320 system apply to the XTEN?
Like other P320 variants, the XTEN's serialized fire control unit is the actual regulated firearm, while the polymer grip module around it is technically an accessory. In states where this modular design is fully supported, that means an XTEN owner could in theory move the same internal chassis into different grip modules for different roles, though buyers should confirm which grip module configurations and calibers are compatible before assuming a particular swap will work, since 10mm-specific components are not universally interchangeable with 9mm P320 parts.
What is 10mm Auto typically used for beyond personal defense?
10mm Auto was originally developed with hunting and field use in mind, and it remains popular today among hikers, hunters, and backcountry travelers in bear country or similar large-predator environments where its higher energy and penetration compared to 9mm are seen as meaningful advantages. It has also found a following among handgun hunters targeting deer-sized game at appropriate ranges, provided the shooter selects a load suited to the intended game.
For shooters who want genuine 10mm power in a familiar, modular, optic-ready platform, the P320-XTEN is one of the more accessible factory options on the market — just confirm California magazine-capacity compliance with your FFL before ordering.
FFL transfer required
This item is a firearm and ships only to a licensed FFL dealer, never to a home address. At checkout, enter your preferred dealer as the shipping address, or leave it blank and we will assign a licensed dealer near you at no extra cost. You complete the background check and paperwork with the dealer when you pick up.
California buyers: handguns must be on the California roster for delivery to a California FFL, a Firearm Safety Certificate (FSC) and DROS are handled at the dealer, and the 10-day waiting period applies. Out-of-state buyers receive the firearm through their own local FFL under their state's rules.
Key attributes
| Transfer | Ships to your FFL dealer |
| Caliber | 10mm Auto |
| Capacity | 15+1 (two magazines included) |
| Barrel Length | 5 in, bull barrel |
| Action | Striker-fired, modular fire control unit |
| Finish | Black nitride |
Frequently asked questions
- What caliber is the P320-XTEN?
- 10mm Auto.
- How many magazines are included?
- Two 15-round magazines.
- What is the barrel length?
- 5 inches, bull-barrel profile.
- Does it come with an optic?
- No, but the slide is factory-cut and optic-ready. XRAY3 day/night sights are included.
- Can this ship to my house in California?
- No. It ships to a licensed FFL dealer, and magazine-capacity compliance should be confirmed first.