SIG SAUER P320-XTEN 10-Round 10mm Pistol

The SIG SAUER P320-XTEN 10mm is a full-size, striker-fired pistol designed to handle the increased size and energy of the 10mm Auto cartridge while retaining the familiar controls and modular construction of the P320 family. This exact configuration, manufacturer part number 320X510BXR3R2MS10, adds a manual safety and uses 10-round steel magazines. It combines a 5-inch bull barrel, full-length optic-ready slide, XRAY3 day/night sights, and an XSeries grip module in a black carry and field-oriented package.

Key Features

• 10mm Auto chambering
• 5-inch bull barrel
• 10+1 capacity with two 10-round steel magazines
• Manual safety
• Optic-ready slide with SIG PRO/RX footprint
• XRAY3 day/night sights
• Front and rear slide serrations
• XSeries polymer grip module
• Flat-faced XSeries trigger
• Full-length accessory rail
• Black finish

Built Around the 10mm Cartridge

The P320-XTEN is proportioned specifically for 10mm Auto rather than simply adapting a smaller-caliber frame. Its five-inch bull barrel provides a long, rigid barrel profile suited to the cartridge and gives the shooter a useful sight radius when using the iron sights. The full-size slide and recoil system help manage the operating forces generated by 10mm ammunition, while the extended grip accommodates the wider steel magazine.

This 10-round variant is intended for buyers who need or prefer a reduced-capacity configuration. Two 10-round steel magazines are included. Because 10mm loads vary substantially in bullet weight, pressure, and intended use, owners should select quality factory ammunition and confirm reliable function before depending on a particular load.

XSeries Grip and Trigger

The XSeries polymer grip module uses an extended beavertail, undercut trigger guard, and aggressive texturing to help the shooter maintain consistent hand placement. The grip circumference is shaped for the larger 10mm magazine while keeping the controls accessible. A full-length accessory rail provides mounting space for compatible weapon lights or other pistol accessories.

SIG’s flat-faced XSeries trigger is designed to provide a consistent finger position and a clean break. The serialized fire-control unit remains the core of the P320 design, but owners should verify component compatibility before changing grip modules, slides, barrels, or other parts because 10mm and .45 Auto components are not interchangeable with every 9mm P320 component.

Manual Safety and Safe Handling

This configuration includes a manual safety. When engaged, the lever is designed to provide an additional mechanical barrier against firing. It does not replace correct handling practices. Keep the muzzle pointed in a safe direction, keep the trigger finger outside the trigger guard until ready to fire, and use a properly fitted holster that fully protects the trigger area.

Before relying on the pistol, practice operating the safety during presentation and reholstering under qualified supervision. Confirm the safety’s function during routine inspections and follow SIG SAUER’s manual for field stripping, lubrication, and maintenance. Store the pistol unloaded and secured from unauthorized access when not in use.

Optic-Ready Slide and XRAY3 Sights

The stainless-steel slide is finished in black and includes front and rear serrations for practical manipulation. Its optic cut uses the SIG PRO/RX footprint. Optic fit can vary by model and screw pattern, so confirm whether a chosen sight mounts directly or requires a compatible plate and hardware. Follow the optic and firearm manufacturers’ torque specifications and verify zero after installation.

XRAY3 day/night sights provide a visible iron-sight system in daylight and reduced-light conditions. They also preserve a conventional aiming option if an electronic optic is removed or unavailable. Sight co-witness height depends on the specific optic installed and should be checked on the assembled pistol.

Full-Size Field and Range Configuration

With an overall length of approximately 8.5 inches, the P320-XTEN offers the stability and control of a full-size pistol. The 10mm chambering makes it relevant for range use, outdoor carry, and other lawful applications where deeper-penetrating or higher-energy loads may be appropriate. Recoil and blast can be greater than with common service cartridges, making sound fundamentals and regular practice especially important.

Prospective buyers should verify local firearm-transfer, magazine-capacity, transportation, and carry requirements before ordering. Use only ammunition marked for 10mm Auto, inspect magazines and recoil components regularly, and replace worn components with compatible SIG SAUER parts.

Specifications

• Manufacturer: SIG SAUER
• Model: P320-XTEN
• Caliber: 10mm Auto
• Barrel length: 5 inches
• Overall length: Approximately 8.5 inches
• Capacity: 10+1
• Action: Striker-fired semi-automatic
• Safety: Manual safety
• Sights: XRAY3 day/night sights
• Optic interface: SIG PRO/RX footprint
• Included magazines: Two 10-round steel magazines
• Manufacturer part number: 320X510BXR3R2MS10
• UPC: 798681712861