SIG Sauer P320 X-Series XFULL Pro 9mm with ROMEO-X Red Dot, 4.7 in Barrel, Black Nitron, 3x 17-Round Magazines (Professional Program)
This full-size P320 X-Series XFULL Pro stands out with an installed SIG Sauer ROMEO-X micro red-dot sight, a 4.7 in carbon-steel barrel, and three 17-round factory magazines. Built on the X-Series grip module with a flat-faced trigger and ambidextrous slide-catch levers, it is a professional-channel configuration originally issued through SIG's Law-Enforcement program and now released as surplus to the civilian market. Markings include "SIG SAUER P320," "9mm x 19," and "NEWINGTON, NH, USA."
Condition
Overall Condition: As-new condition with no signs of prior handling beyond what is typical from inspection (see photos).
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent - Sharp lands and grooves.
Specific Condition Notes: This example appears unused beyond factory test firing and routine handling.
What’s Included
- SIG Sauer ROMEO-X micro red-dot sight (installed; open-emitter, 7075 aluminum housing, side-load battery, low deck height for co-witness with standard-height irons)
- ROMEO-X accessory kit with CR1632 battery
- Three 17-round SIG Sauer factory steel double-stack magazines
- SIG Sauer factory gray hard case
- SIG Sauer P320 owner's manual and paperwork
- Cable lock
The XFULL Pro configuration pairs a full-length 4.7 in barrel with a stainless-steel slide finished in black Nitron. The slide features front and rear cocking serrations, an optics cut, and a chamfered muzzle shoulder for smooth holstering. Fixed sights consist of a bright green front blade and a fixed rear notch positioned behind/within the optic assembly.
The striker-fired, locked-breech short-recoil system uses a carbon-steel barrel and a polymer grip module. The X-Series full-size module provides an extended beavertail and a high undercut for a secure, high-grip purchase. Controls include a left-side push-button magazine release and ambidextrous slide-catch levers, while the X-Series flat-faced trigger delivers a consistent, straight press.
The installed SIG Sauer ROMEO-X micro red dot brings a red reticle, an open-emitter design, and a 7075 aluminum housing. Its side-load battery compartment simplifies maintenance, and the optic's low deck height enables co-witness with standard-height iron sights.
Capacity is 17+1 rounds, and three factory steel magazines are included. An integral 3-slot M1913 Picatinny accessory rail supports lights or other rail-mounted accessories. This pistol originates from SIG Sauer's Professional Program for law-enforcement personnel and has been made available to the civilian market as surplus. Country of origin is the United States, and the observed case label corresponds to part number W320F-9-BXR3-PRO-RXX.