SIG SAUER P320 XTEN 15-Round Optic-Ready 10mm Pistol

The SIG SAUER P320 XTEN 10mm adapts the modular P320 platform to the full-power 10mm Auto cartridge with a 5-inch barrel, optic-ready slide, X-Series grip, factory night sights, and two 15-round steel magazines. This black, striker-fired pistol is intended for owners who want greater cartridge capability in a familiar full-size P320 format. This listing is manufacturer part number 320X5-10-BXR3-R2 (stored as 320X510BXR3R2), UPC 798681652341.

Purpose-Built 10mm P320

The XTEN is more than a caliber label applied to a standard compact pistol. SIG SAUER’s exact catalog configuration pairs the 10mm Auto chambering with a full-size X-Series layout, 5-inch barrel, optic-ready slide, 15-round magazines, and accessory rail. The longer upper assembly and substantial grip provide the size and control surface appropriate for a powerful service-size handgun.

10mm ammunition is available in a broad range of loadings, and recoil, velocity, and function can vary considerably. Owners should use ammunition that meets manufacturer guidance, confirm reliable operation during controlled practice, and avoid assuming that every 10mm load will feel or perform the same. Qualified instruction is especially valuable for shooters moving from smaller service calibers.

Five-Inch Barrel and Striker-Fired Action

This model uses a 5-inch black barrel and the striker-fired P320 operating system. The full-length barrel supports the XTEN’s balanced, full-size configuration, while the consistent striker-fired action provides the same basic operating sequence from shot to shot. The protected product record identifies no manual thumb safety, making careful trigger-finger discipline and a rigid holster that fully covers the trigger guard essential.

The serialized fire-control unit remains the core of the modular P320 platform, but parts compatibility should not be assumed across different calibers and sizes. Any grip, slide, barrel, recoil assembly, or magazine change must be verified specifically for the 10mm XTEN.

X-Series Grip and 15-Round Capacity

The modified polymer X-Series grip module provides a full firing-hand interface and is designed around the larger 10mm magazine. SIG SAUER specifies two 15-round steel magazines for this exact SKU. The included pair gives the owner a primary and spare magazine for range work, lawful field use, defensive training, or secure storage.

Magazine-capacity restrictions vary by jurisdiction, and the 15-round configuration may not be legal in every location. Replacement magazines should be verified for the P320 XTEN 10mm rather than selected by the P320 name alone.

Optic-Ready Slide and XRAY3 Sights

The black serrated slide is optic ready, allowing the owner to add a compatible pistol optic after confirming the footprint, plate, screw length, and torque requirements. An optic is not included with this SKU. Factory XRAY3 day/night sights provide a complete conventional aiming system for immediate use without an electronic sight.

Any optic installation should follow the manufacturer’s instructions. Confirm secure mounting, zero, and reliable function during controlled range use before relying on the finished setup. The slide serrations provide defined handling surfaces for normal loading, unloading, and inspection procedures.

Accessory Rail and Equipment Selection

The X-Series grip includes a rail for compatible lights or other lawful accessories. Confirm physical and electrical fit before purchasing equipment, and select a holster made for the exact XTEN configuration and any installed light or optic. Added equipment changes external dimensions, balance, and handling and should be included in all function testing.

Key Specifications

• Manufacturer: SIG SAUER
• Model: P320 XTEN
• Manufacturer part number: 320X5-10-BXR3-R2
• UPC: 798681652341
• Caliber: 10mm Auto
• Action: Striker-fired semi-automatic
• Barrel length: 5 inches
• Finish: Black
• Capacity: 15 rounds
• Magazines: Two 15-round steel magazines
• Grip: Modified polymer X-Series grip
• Sights: XRAY3 day/night sights
• Slide: Serrated and optic ready
• Accessory rail: Yes
• Manual safety: No

Before Ordering

Firearm, magazine-capacity, transfer, possession, and carry laws vary by jurisdiction. This pistol must be transferred through a qualified dealer where required, and the buyer is responsible for confirming eligibility and local restrictions. Review the MPN and UPC carefully to distinguish this standard black XTEN from other P320 10mm variants.

Before first use, read the current SIG SAUER operator’s manual, inspect and maintain the pistol as directed, and confirm safe function with the intended ammunition. Always keep the muzzle pointed in a safe direction, keep your finger off the trigger until ready to fire, treat every firearm as loaded, and know the target and what lies beyond it.