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There's a reason the P320 keeps showing up in holsters everywhere, and the X-Full is the version a lot of folks land on once they shoot one. This is the full-size X-Series 9mm with a 4.7 inch carbon steel barrel, a Nitron-finished stainless slide, and 17+1 on tap, and this particular model ships with SIG's ROMEO-X red dot already mounted using the SIG-LOC PRO system. No hunting down an optic, no plate confusion, no separate zeroing trip before you can run it the way it was meant to be run. XRAY3 day/night sights ride underneath and co-witness through the window, so you've got a solid backup sight picture in any light.
The X-Series grip module is where this gun separates itself from a standard P320. The extended beavertail and deep trigger guard undercut let you choke up high on the bore, which flattens out recoil and speeds up follow-up shots. Add the X-Series flat trigger with its clean break and the full-size sight radius, and you've got a pistol that's easy to shoot well, whether that's weekly range sessions, a home defense role, or your first steps into competition. A full-length M1913 rail up front handles lights and lasers without drama.
The ROMEO-X is built on the same tech SIG developed for its military optics, with a rugged 7075 aluminum housing and distortion-free aspheric glass. MOTAC motion activation wakes it the instant the gun moves, and the side-loading CR1632 battery is rated around 20,000 hours, so you can swap it without pulling the optic or losing zero.
Two 17-round steel magazines come standard, and like every SIG pistol, it's backed by the modular fire control unit design that made the P320 famous. Serialized internals mean grip modules and calibers can change down the road while the heart of the gun stays the same. It's a lot of pistol in one box, set up right from the factory.
Yes, the ROMEO-X optic ships mounted from the factory using SIG's SIG-LOC PRO system. That means no extra plates to buy and no guesswork on footprint compatibility. You'll still want to confirm zero with your preferred ammo, but the hard part is already done.
You can. The pistol wears XRAY3 day/night sights that co-witness through the ROMEO-X window thanks to the optic's low deck height. If the battery ever dies at the worst moment, you've got a clear, high-visibility sight picture to fall back on.
The CR1632 battery is rated for a minimum of 20,000 hours of continuous runtime at medium brightness, and MOTAC motion activation stretches real-world life even further by powering down when the gun sits still. The side-loading battery tray lets you swap it without removing the optic, so your zero stays put.
It's a full-size gun with a 4.7 inch barrel, so it favors range work, home defense, and duty-style use. That said, plenty of people carry full-size pistols with a good holster and belt. If deep concealment is the main goal, the X-Compact or X-Carry versions of the P320 trim things down while keeping the same X-Series feel.
| UPC | 798681720255 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 320XF-9-BXR3-RXSL |
| Action | |
| Barrel Length | 4.7" |
| Caliber/Gauge | 9mm |
| Capacity | 17 + 1 |
| Safety | Manual |
| Slide Description | Optic Ready |
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