SIG Sauer P365X ROMEOZero 9mm Micro-Compact, 3.1 inch Barrel, XSeries Grip, 12+1, Flat Trigger
This SIG Sauer P365X ROMEOZero combines the micro-compact 9mm platform with a factory-installed Sig Sauer Romeo Zero Red Dot for fast, clear aiming in a small footprint. It features the XSeries grip module, a flat-faced trigger, and a modular serialized fire-control unit, with a 12+1 capacity using the included 12-round magazines. The slide carries both "P365" and "X" markings, and the frame is marked "NEWINGTON, NH USA."
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are minor markings from previous handling and use. Please refer to the photos for close-up views.
What’s Included
- SIG SAUER factory hard case
- SIG SAUER P365 series owner's manual
- SIG SAUER ROMEOZero micro red-dot sight (installed)
- Rear-notch backup aiming reference integral to ROMEOZero optic
- Two 12-round steel magazines (marked "MADE IN USA")
The P365X is the micro-size member of SIG Sauer’s XSeries, pairing a 3.1 inch barrel with the XSeries grip module for compact dimensions and a secure, modern grip profile. This example offers a 12+1 capacity and comes with two 12-round magazines.
Optics are front and center with a factory-installed SIG SAUER ROMEOZero micro red dot. The red-dot serves as the primary sighting system, while the rear sight position is occupied by the optic body. A rear-notch backup aiming reference is integral to the ROMEOZero, and a front sight with a green ring/dot provides a bright front aiming point.
The pistol runs a striker-fired action with a flat-faced trigger for a consistent, straight-back press. It uses SIG’s modular, serialized fire-control unit (FCU) and has no external manual thumb safety.
Build details include a matte black slide with front and rear serrations for positive manipulation and a robust polymer frame. A single-slot SIG-style accessory rail is molded into the frame for compatible lights or accessories.
Markings and origin details are present and clear: the slide is marked "P365" and "X," the frame is marked "NEWINGTON, NH USA," and the country of origin is the USA.




