SIG Sauer P320-XTEN 10mm Full-Size X-Series, 5-inch Bull Barrel, Nitron Slide, Night Sights, Optics-Cut, 15+1
This SIG Sauer P320-XTEN is a full-size, X-Series 10mm built on the modular P320 platform with a removable, serialized stainless-steel FCU. It pairs a 5-inch carbon-steel bull barrel with a stainless slide finished in black Nitron and includes steel night sights. The slide is optics-cut with a two-screw cover plate, and the frame features a 5-slot MIL-STD-1913 rail, a flat-faced trigger, and a reversible ambidextrous magazine release. Capacity is 15+1, and it ships with two 15-round steel magazines.
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.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Minor, superficial scratches and blemishes are present on exterior surfaces. The bore is clean and shiny.
What’s Included
- SIG Sauer factory hard case (gray)
- Manual
- Two 15-round steel, double-stack magazines
The P320-XTEN configuration centers on a 5-inch, non-threaded carbon-steel bull barrel for added weight at the muzzle. The stainless slide wears a black Nitron finish and includes front and rear serrations, a large ejection port, and an optics cut with a two-screw cover plate. Factory markings include “XTEN”/“P320” on the slide and “10mm AUTO / SIG SAUER” on the chamber.
Sight picture comes from steel 3-dot night sights, with a tritium front featuring a green ring (TG-H3) and a matching steel tritium rear. This setup provides a bright, defined reference in varied lighting.
The polymer frame is full-size and X-Series styled with an extended beavertail and textured grip. An integral 5-slot MIL-STD-1913 accessory rail supports light or laser attachment. The flat-faced trigger offers a straight press, while the magazine release is reversible and ambidextrous.
Capacity is 15+1 in 10mm, and this pistol includes two 15-round, steel double-stack magazines. The design uses SIG’s modular P320 architecture with a removable, serialized stainless-steel fire control unit. Made in the USA.