SIG Sauer P320 XFULL PRO RXX 9mm with ROMEO-X Pro, X-RAY3 Front, 4.7 in Barrel, 17+1, LE Surplus
This full-size SIG Sauer P320 XFULL PRO RXX package stands out with a factory-installed SIG ROMEO-X Pro red dot, a 4.7 in carbon steel barrel, and the XSeries grip module with extended beavertail and high undercut. Previously issued to law enforcement and released as surplus to the civilian market, it pairs the PRO optics footprint slide with X-RAY3 front sight and a robust Nitron-finished stainless slide.
Condition
Overall Condition: As-new condition with no signs of prior handling beyond what’s typical from inspection (see photos).
Specific Condition Notes: This pistol appears unused beyond factory testing and routine handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What’s Included
- SIG Sauer ROMEO-X red dot sight (installed)
- SIG Sauer ROMEO-X accessory kit (includes CR1632 battery)
- SIG Sauer factory hard case
- SIG Sauer P320 owner's manual and literature
- SIG Sauer cable lock
- 3x 17-round factory SIG Sauer P320 steel magazines
The PRO slide is cut for the PRO footprint, allowing direct mounting of ROMEO1PRO, DeltaPoint Pro, and RMR-pattern optics. The included ROMEO-X Pro features a red reticle and is set up for standard-height co-witness capability with the pistol’s iron sights.
The XSeries full-size polymer grip module provides an extended beavertail and a high undercut for a secure, consistent purchase. Controls include ambidextrous slide catch levers, a left-side magazine release, and a flat trigger within the striker-fired P320 Fire Control Unit architecture.
The 4.7 in carbon steel barrel is marked "9mm x 19," and the stainless steel slide wears a durable Nitron black finish. Sighting consists of an X-RAY3 tritium front dot with a high-visibility green ring and a plain rear blade integrated into the optic-plate assembly.
This XSeries full-size configuration offers a 17+1 capacity and a 3-slot M1913/Picatinny accessory rail for lights or other duty accessories. The frame is marked "NEWINGTON, NH, USA," and the case label lists SKU W320F-9-BXR3-PRO-RXX, matching the factory configuration.




