The Sig Sauer P320 Pro is a versatile 9mm compact pistol built on the modular X-SERIES platform and optimized for shooters who want modern optics without sacrificing backup iron sights. This pistol features a factory-installed ROMEO1PRO reflex sight mounted low to the slide, a design choice that lets you co-witness standard-height X-RAY3 night sights for redundancy and confidence in any lighting condition. The 3.9-inch barrel balances shootability and concealability, making it equally at home on the range, in competition, or as a carry piece for those who trust red-dot aiming.

The P320 Pro's core strength lies in Sig's proven modular design: you can swap grip modules, calibers (via fire control units), and other components to tailor the pistol to your needs. The stainless steel slide is finished in durable black Nitron, and the optic-ready design gives you factory support for modern reflex-sight shooting without custom gunsmithing. The low-profile ROMEO1PRO mount doesn't require suppressor-height irons, so your standard backup sights stay visible and usable—a practical advantage if your red dot ever fails or needs maintenance.

Compatible only with 9mm, .357 SIG, and .40 S&W fire control units, the P320 Pro is not compatible with .45 ACP FCUs. The slide assembly fits Compact-size grip modules from the X-SERIES and non-X-SERIES families. A quality barrel is required but not included; verify your preferred barrel is compatible before assembly. Whether you're stepping up to optics for the first time or consolidating your duty and range gear into one capable platform, the P320 Pro delivers the modern sighting system shooters are demanding today.

The Sig Sauer P320 Pro is a versatile 9mm compact pistol built on the modular X-SERIES platform and optimized for shooters who want modern optics without sacrificing backup iron sights. This pistol features a factory-installed ROMEO1PRO reflex sight mounted low to the slide, a design choice that lets you co-witness standard-height X-RAY3 night sights for redundancy and confidence in any lighting condition. The 3.9-inch barrel balances shootability and concealability, making it equally at home on the range, in competition, or as a carry piece for those who trust red-dot aiming.

The P320 Pro's core strength lies in Sig's proven modular design: you can swap grip modules, calibers (via fire control units), and other components to tailor the pistol to your needs. The stainless steel slide is finished in durable black Nitron, and the optic-ready design gives you factory support for modern reflex-sight shooting without custom gunsmithing. The low-profile ROMEO1PRO mount doesn't require suppressor-height irons, so your standard backup sights stay visible and usable—a practical advantage if your red dot ever fails or needs maintenance.

Compatible only with 9mm, .357 SIG, and .40 S&W fire control units, the P320 Pro is not compatible with .45 ACP FCUs. The slide assembly fits Compact-size grip modules from the X-SERIES and non-X-SERIES families. A quality barrel is required but not included; verify your preferred barrel is compatible before assembly. Whether you're stepping up to optics for the first time or consolidating your duty and range gear into one capable platform, the P320 Pro delivers the modern sighting system shooters are demanding today.