SIG Sauer P320-XTEN XSeries Full-Size 10mm, 5 in Bull Barrel, Nitron, Night Sights, Optics-Cut Slide, 15+1 Capacity
This P320-XTEN is SIG Sauer's first 10mm Auto entry in the P320 line (introduced 2022), built on the modular P320 platform with a removable, serialized FCU. It pairs a 5 inch bull barrel with a Nitron-finished, optics-cut slide and steel night sights, delivering a full-size XSeries configuration with a 15+1 standard capacity. Ambidextrous slide catch levers, a flat-faced trigger, and an accessory rail round out a feature set aimed at capable, modern 10mm performance.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This pistol shows minimal handling marks from previous use. The bore presents a bright, mirror finish. Please refer to the listing photos for close-up views.
What’s Included
- SIG Sauer factory hard plastic pistol case
- SIG Sauer owner's manual
- Two 15-round factory SIG Sauer steel double-stack magazines for the P320-XTEN (10mm)
The XSeries Full-Size frame features an extended beavertail, a high undercut, and aggressive stippling for a secure grasp. Its flat-faced trigger provides a straight press, and the design omits an external manual safety or decocker while retaining ambidextrous slide catch levers.
The 5 inch bull-profile barrel anchors a Nitron-finished slide with front and rear serrations. The slide is optics cut with a removable cover plate and is compatible with SIG ROMEO2 and Trijicon RMR pattern optics. Steel night sights include a tritium front sight marked TG-H3 (green) and a steel square-notch rear.
Built on the P320 modular platform, the serialized, removable FCU allows the grip module, slide, and barrel assembly to be configured within the P320 ecosystem. A frame accessory rail is present for mounting compatible lights or other accessories as desired.
Chambered in 10mm Auto, the XTEN carries a 15+1 capacity using factory steel double-stack magazines. Published dimensions are 8.5 in L x 5.6 in H x 1.3 in W, with a weight of about 33 oz. The receiver is stainless steel, the frame is polymer, and the pistol is made in the USA.