SIG Sauer P320 Sub-Compact BSS 9mm, 3.6" Barrel, Night Sights, 12-Round
This P320 Sub-Compact BSS offers SIG Sauer’s modular striker-fired design in a short-slide, short-grip package built for discreet carry. Produced between 2015 and 2019, it features the serialized fire-control unit that allows caliber and size conversions across the P320 line, factory SIGLITE tritium night sights, and a Nitron-finished stainless-steel slide over a lightweight polymer frame. With its 3.6-inch stainless barrel and 12-round flush-fit magazines, it delivers full-capacity performance in a compact footprint.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent – clean, mirror finish with sharp lands and grooves.
Specific Condition Notes: The pistol exhibits minimal handling marks, and all controls function smoothly.
What’s Included
- SIG Sauer factory plastic hard case with 320SC-9-BSS end-label
- SIG Sauer P320 / P320 X-Series operator’s manual
- Two 12-round SIG Sauer factory steel flush-fit magazines stamped “MADE IN USA”
The heart of this pistol is SIG’s modular fire-control unit (FCU), serialized 58B180406, which can be moved into different grip modules and slide assemblies within the P320 family. This flexibility lets owners tailor size or caliber without another ATF transfer.
The Sub-Compact BSS variant ships with SIGLITE tritium night sights—white-outline front and two-dot rear—for clear sight pictures in low light. Forward and rear serrations on the Nitron-coated slide provide easy manipulation from any position.
A 3.6-inch stainless barrel and absence of an accessory rail keep the profile short, making the pistol well-suited for concealed carry while still offering a 12+1 capacity. The polymer grip module includes an integral beavertail and reversible magazine release to accommodate different hand sizes and shooting preferences.
Built in the United States, this early-pattern P320 predates the military M17/M18 adoption, giving collectors and shooters a snapshot of SIG’s original design approach. Its excellent overall and bore condition make it ready for range duty or daily carry right out of the box.