SIG Sauer P320 Compact Nitron BSS 9mm with 4.6" Threaded Barrel & SIGLITE Night Sights
The P320 Compact Nitron BSS combines SIG Sauer’s proven striker-fired action with a factory-threaded barrel, tritium night sights, and the brand’s modular fire control unit. This July 2016 production pistol offers the flexibility to add suppressors or comps, swap grip modules, and run either flush-fit or extended magazines—all in a carry-sized package that shares DNA with the U.S. military’s adopted M18.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Rifling Condition: Good Rifling - Intact, well-defined lands and grooves.
What’s Included
- SIG Sauer 9 mm factory threaded barrel
- SIG Sauer polymer OWB paddle holster for P320
- Factory SIG Sauer hard carry case (model-labeled 320C-9-BSS)
- Factory cable gun lock in sealed package
- One 21-round SIG Sauer factory steel magazine (extended, made in Italy)
- One 15-round SIG Sauer factory steel magazine (flush-fit, made in Italy)
The 4.6-inch carbon-steel barrel is factory threaded, ready for suppressors and other muzzle devices without additional gunsmithing.
At the heart of the pistol is SIG’s removable fire control unit, allowing caliber or grip module changes to suit different roles or hand sizes while retaining a single serialized component.
Front and rear slide serrations provide reliable purchase, and the Nitron matte-black finish protects the stainless-steel slide against wear and corrosion.
SIGLITE tritium night sights ship standard on the BSS variant, delivering a bright, three-dot sight picture in low light and daylight alike.
The reversible magazine release, accessory rail, and tabbed safety trigger round out a feature set adopted by numerous U.S. law-enforcement agencies and mirrored in the military’s M18 platform.