SIG Sauer P320 Full-Size PRO RXP 9mm with Mounted ROMEO1PRO Red Dot, 4.7 in Barrel, 17+1, Nitron Finish
This SIG Sauer P320 Full-Size PRO RXP is a factory PRO-series package with a mounted SIG Sauer ROMEO1PRO red-dot sight and a 4.7 in barrel. It uses the modular P320 fire control unit architecture, offers a 17+1 capacity, and features a Nitron-finished slide with front and rear serrations. The gray factory case label shows model code L320F-9-BXR3-PRO-RXP with a packaging date of 21-MAY-2020.
The pistol integrates practical upgrades such as a flat-faced trigger, aggressive grip texturing with an extended beavertail, a 3-slot M1913 Picatinny rail on the dust cover, and 3-dot iron sights with a bright green front dot. The frame is marked NEWINGTON, NH, USA, and the included steel, double-stack magazines are marked Made in Italy.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: Significant markings from previous handling, signs of heavy use, and a lot of holster wear and scratches throughout. There is rust on various parts of the firearm, including the optic screws. The optic lens has scratches. Please refer to the photos for a closer look.
What’s Included
- Optic: SIG Sauer ROMEO1PRO red-dot sight with steel shroud (installed)
- Two 17-round steel magazines (Made in Italy)
- SIG Sauer factory hard case (gray)
- SIG ROMEO1PRO owner's manual
The mounted SIG Sauer ROMEO1PRO red dot is factory-paired with this PRO RXP and includes a steel protective shroud. It uses left-side rubberized plus/minus control buttons, offers 12 brightness settings, is IPX-7 rated, and carries a 20,000-hour runtime rating. It is an open-emitter design on the PRO footprint, and the top cap is marked 'OPEN'.
The full-size P320 PRO RXP configuration combines the striker-fired action with a flat-faced trigger for a consistent, straight-back press. The Nitron slide includes front and rear cocking serrations and an external extractor, and the barrel features a loaded-chamber witness port.
The polymer grip module provides aggressive texturing and an extended beavertail, while the dust cover hosts a 3-slot M1913 Picatinny rail for accessory mounting. The pistol retains 3-dot iron sights with a bright green front post and a rear notch with twin dots as a backup to the red dot.
Built on SIG's modular P320 platform, the serialized fire control unit is the core of the pistol. This example includes two 17-round steel magazines, a gray SIG Sauer factory hard case, and the ROMEO1PRO manual. The frame is marked NEWINGTON, NH, USA, and the original case label lists model L320F-9-BXR3-PRO-RXP with a packaging date of 21-MAY-2020.