Sig Sauer P320 XFull 9mm Pistol - 4.70" Barrel, 10-Round Capacity, Black Finish - Model 320XF9BXR3PR210

The Sig Sauer P320 XFull 9mm pistol brings serious capability to shooters who demand a duty-grade platform without compromise. Built on Sig's modular XSeries architecture, this full-size striker-fired pistol combines a 4.70-inch barrel with a purpose-built grip module designed for control and ergonomics. Whether you're training at the range, carrying for home defense, or building a dedicated competition setup, the P320 XFull delivers the precision and reliability Sig is known for, backed by a feature set that acknowledges how modern shooters actually work.

The XSeries grip module isn't just marketing—it's a redesign that matters. The extended beavertail, high undercut trigger guard, and improved magwell combine to reduce recoil impulse and speed reloads. Pair that with the XSeries flat trigger, and you get a clean, predictable break without the mushy reset of older designs. The optic-ready slide gives you the flexibility to mount a Romeo1Pro, Delta Point Pro, or RMR-pattern red dot when you're ready, keeping your options open whether you prefer iron sights or glass.

Sig equipped this pistol with X-Ray3 day/night sights—tritium-outlined front sight and tritium vertical line rear—so you're never fumbling in low light. The stainless steel frame and slide with Nitron finish handle rough treatment, and the 10-round magazine capacity keeps you legal in all 50 states while delivering practical on-target performance. Two steel magazines come in the box, giving you immediate reload capability. At 29.6 ounces loaded, it's substantial enough for a full-size platform without excessive weight, and the 8.2-inch overall length balances controlability with magazine capacity in a modern package.

If you've shot P320s before, you already know the modular grip system. If you're new to Sig's lineup, this is the generation that fixed the early teething issues—tested, refined, and trusted by professionals and serious shooters nationwide.

Key Features

• XSeries grip module with extended beavertail and high undercut trigger guard for improved handling and control
• Optic-ready slide compatible with Romeo1Pro, Delta Point Pro, and RMR-pattern red dots
• XSeries flat trigger for a crisp, consistent break
• X-Ray3 day/night sights—tritium front post with outlined rear for low-light performance
• Stainless steel frame and slide with Nitron finish for corrosion resistance and durability
• Striker-fired design with full safety redundancy
• Two 10-round steel magazines included
• Modular architecture allows grip size and trigger module customization

Specifications

Frequently Asked Questions

What red dot sights will mount on the P320 XFull's optic-ready slide?

The XSeries slide is compatible with Romeo1Pro, Delta Point Pro, and RMR-pattern red dots. Make sure the specific optic you choose supports the RMR footprint or is expressly listed as compatible with Sig's XSeries platform.

Can I swap the grip module to a different size?

Yes—the P320 is built on Sig's modular platform. You can purchase different grip module sizes and configurations separately and swap them onto this slide and fire control unit, allowing you to customize the gun to your hand size and use case.

What sights come installed on this pistol?

The P320 XFull ships with Sig's X-Ray3 day/night sights. The front sight is a tritium post, and the rear is a tritium vertical line sight, both visible in daylight and low-light conditions. Both are co-witnessed for use with mounted optics.

How many magazines are included?

Two 10-round steel magazines come in the box, both compatible with the full-size P320 platform.