Sig Sauer P320 Full Size 9mm

Updated August 24, 2026

This SIG Sauer P320 Full Size semi-automatic pistol is chambered in 9mm and represents the full-size configuration of one of SIG Sauer’s most important modern handgun designs. Serial number 58J551161, this example features an approximately 4.5" barrel with a shiny bore and remains in good overall condition. The pistol utilizes a full-size polymer frame with a textured synthetic grip paired with a steel optic-cut slide, allowing a compatible red dot sight to be mounted if desired. Three magazines are included along with a SIG Sauer hard case, creating a particularly complete package. The P320 became widely known for its modular fire-control system, which allows the core serialized assembly to be used across a variety of frame and slide configurations. That adaptability helped make the platform one of the defining SIG Sauer pistols of the modern era. With three magazines, factory-style hard case, optic-ready slide, shiny bore, and classic full-size proportions, this is an appealing P320 package. Please see photos. Sig Sauer P320 Full Size 9mm Semi 4.5 Shiny 58J551161 Good

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