Sig Sauer P320 Full-Size Nitron BSS 9mm – Optic-Ready, Night Sights, Custom Magwell, 3 Magazines
The Sig Sauer P320 Full-Size Nitron BSS is a striker-fired 9mm built around Sig’s serialized stainless-steel fire-control unit, giving it the well-known modularity that lets owners swap calibers, slides, and grip modules with ease. This early-production 2017 example features an optic-ready slide, factory SIGLITE tritium night sights, and an aftermarket aluminum flared magazine well that speeds reloads. Three 17-round magazines and the factory hard case round out a package that offers duty-sized performance with true adaptability.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear. Sharp lands and grooves.
Specific Condition Notes: This pistol shows moderate handling marks but retains a clean overall appearance and functions correctly.
What’s Included
- SIG Sauer factory plastic hard case (black)
- Three 17-round steel SIG Sauer magazines marked “MADE IN ITALY”
This full-size P320 uses a 4.7 inch stainless barrel and a Nitron-finished slide with front and rear cocking serrations for positive manipulation. The external extractor includes a viewing port that doubles as a loaded-chamber indicator.
The slide is cut for the SIG ROMEO1PRO / Leupold DeltaPoint footprint, allowing direct mounting of a red-dot optic without additional plates. SIGLITE tritium night sights provide a clear, three-dot picture in low light and co-witness with most slim optics.
Inside, the flat-faced, skeletonized trigger offers a straight pull and a distinct reset. The reversible magazine release supports left- or right-handed shooters, and the integral accessory rail accepts weapon lights or lasers.
An aftermarket aluminum flared magwell funnels magazines smoothly into the grip module, complementing the three supplied 17-round magazines for faster reloads.
Built in the USA, this 2017 production gun sits in the same lineage as the M17 adopted by the U.S. Army, giving it added collector interest while remaining a fully modern sidearm ready for range or duty use.