Sig Sauer P320 XFull Handgun 9mm Luger 17rd Magazines (2) 4.7" Barrel Black
$786.38
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The Sig Sauer P320 XFull is a full-size 9mm striker-fired pistol built for shooters who demand a modern platform with factory-installed optics capability and refined ergonomics. This XSeries variant comes out of the box equipped with a ROMEO-X reflex sight, eliminating the guesswork of aftermarket mounting and zeroing. If you're running a duty rig, competition setup, or hunting for a reliable full-size 9mm with integrated iron fallbacks, the P320 XFull bridges the gap between traditional sights and red-dot speed without compromise.
The ergonomic envelope is purpose-built: an XSeries grip module in full-size medium dimensions features an extended beavertail that reduces felt recoil and locks your hand in place, while the high undercut trigger guard lets you ride high on the backstrap for control. The flat XSeries trigger breaks clean and consistent, a precision upgrade over the standard P320 unit. Sighting is backed up by X-Ray3 day/night sights—visible in bright sun or low light—so you're never left without a sight picture if the optic fails or shadows appear.
Steel construction keeps things durable: both the slide and frame are stainless steel with a Nitron finish that shrugs off handling wear and corrosion. The 4.7-inch barrel keeps the sight radius at a practical 6.6 inches while the overall profile—8.2 inches long, 5.9 inches tall, 1.3 inches wide—balances pointability with capacity. Two 17-round steel magazines deliver serious firepower, and the modular P320 platform means you can swap frames and slides down the road to customize caliber or size without a full new gun.
Built for serious shooters, not mall-ninja aesthetics, the P320 XFull works as hard as you do.
Key Features
- Factory-installed ROMEO-X reflex sight—ready to run out of the box
- XSeries grip module with extended beavertail and high undercut trigger guard for control and comfort
- XSeries flat trigger for crisp, predictable breaks
- X-Ray3 day/night iron sights for reliable backup
- Stainless steel slide and frame with Nitron finish for durability
- Two 17-round steel magazines included
- Modular design—swap grips and slides to customize your setup
- Striker-fired action for intuitive operation
Specifications
| Caliber | 9mm Luger |
| Barrel Length | 4.7 inches |
| Overall Length | 8.2 inches |
| Overall Height | 5.9 inches |
| Overall Width | 1.3 inches |
| Sight Radius | 6.6 inches |
| Weight (with magazine) | 28.7 ounces |
| Magazine Capacity | 17 rounds (2 magazines included) |
| Frame Material | Stainless Steel |
| Slide Material | Stainless Steel |
| Slide Finish | Nitron |
| Grip Module | XSeries Full Size Medium |
| Trigger | Striker-fired with XSeries Flat Trigger |
| Sights | ROMEO-X Reflex Sight + X-Ray3 Day/Night Sights |
Frequently Asked Questions
What sights come on the Sig Sauer P320 XFull?
The P320 XFull ships with a ROMEO-X reflex sight already mounted on the slide, plus X-Ray3 day/night iron sights that co-witness as backup. This gives you a modern red-dot platform with traditional sight insurance.
Is the P320 XFull modular, and can I swap parts?
Yes. The P320 platform is built on modularity—you can swap grip modules and slides to change caliber or size without buying a new firearm. The XFull comes in XSeries full-size medium configuration, but the architecture supports future customization.
How many magazines are included?
Two 17-round steel magazines come in the box.
What is the weight and what is this pistol best suited for?
The P320 XFull weighs 28.7 ounces (with a loaded magazine). The full-size profile, optics-ready setup, and 17-round capacity make it well-suited for duty, range work, home defense, and competition shooting where you want a modern pistol with established ergonomics and real firepower.
