SIG Sauer P320 XFULL X-Series 9mm Luger, 4.7 in Barrel, Nitron, Optics-Ready Slide, 21+1 Capacity, Four Magazines Included
This full-size SIG Sauer P320 XFULL X-Series stands out with its modular, serialized fire-control unit, X-Series grip module, and optics-cut Nitron slide (cover plate not installed or included). It comes ready with a flat-faced trigger, 3-dot iron sights (green-dot front, two-dot square-notch rear), and generous magazine supply: two 21-round and two 17-round P320 steel magazines. A SIG factory hard case and owner's manual are included.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Rifling: Excellent - Sharp lands and grooves.
Specific Condition Notes: The pistol is in solid shape with visible cosmetic imperfections, scratches, blemishes, and areas of finish loss from prior handling and use.
What’s Included
- SIG Sauer factory hard case with SIG logo
- SIG Sauer owner's manual
- Two 21-round steel magazines
- Two 17-round steel magazines
The P320 XFULL X-Series uses SIG's modular removable fire-control unit (serialized FCU), allowing the core assembly to be visible through the FCU window and housed in the X-Series grip module. The grip features a high beavertail, an undercut trigger guard for a higher hold, textured panels, and a mildly flared magwell for confident magazine changes.
The X-Series slide is Nitron finished and optics-cut; the optics cut is currently open with no cover plate installed. Front and rear slide serrations provide positive manipulation. A 4.7-inch steel barrel anchors the full-size profile.
Controls include a flat-faced trigger, an extended slide catch, and a left-side magazine release. The pistol uses a striker-fired, short-recoil locked-breech action and has no external manual safety. A full-length dust cover integrates a 4-slot Picatinny accessory rail.
The pistol ships with two 21-round and two 17-round magazines. With the 21-round magazine installed, capacity is 21+1. The sights are straightforward and fast: a green-dot front paired to a two-dot square-notch rear.




