Description
The Sig Sauer P320 XCompact Romeo X is the carry-size P320 with the red dot already mounted and the XSeries grip module already fitted. MAG5 Firearms stocks it with a 3.6-inch barrel, a beavertail frame, a Picatinny rail and a ROMEO-X Pro sitting on the factory optic cut.
Why the Included Optic Matters Most on a Short Barrel
A 3.6-inch slide gives a sight radius under five inches, which is where iron sights are hardest to use well. A red dot removes the alignment problem entirely, so the accuracy gain is larger here than on a full-size gun.
On the Sig Sauer P320 XCompact Romeo X the ROMEO-X Pro arrives mounted to the factory cut with no adapter plate, no gunsmith appointment and no discovering afterward that the irons no longer line up.
Sig Sauer P320 XCompact Romeo X Grip Module and Handling
The XCompact module brings a flat trigger and a more aggressive texture than the standard P320 grip, and the beavertail lets the hand ride higher over an already low bore axis.
Those are the first upgrades most P320 owners make. Buying this configuration skips them, and skips the aftermarket optic plate that usually follows.
Sig Sauer P320 XCompact Romeo X Specifications
| Manufacturer | SIG SAUER |
|---|---|
| Model | P320 X-Compact with Optic |
| Part Number | 320XC9BXR3RXX |
| Caliber | 9mm Luger |
| Barrel Length | 3.6 inches |
| Barrel Material | Black Carbon Steel |
| Slide | Black Nitron Stainless, Optic Ready, Serrated |
| Frame | Black Stainless with Beavertail and Picatinny Rail |
| Grip Module | Black XCompact Polymer |
| Optic Included | SIG ROMEO-X Pro |
| Action | Striker Fired |
| UPC | 798681691722 |

Carrying and Shooting
A 3.6-inch barrel sits at the balance point between concealment and capability. The pistol hides under a t-shirt but still fills the hand, which is why owners practice with it rather than only carrying it.
Most shooters cut their time to first hit measurably within one range session after mounting a dot, and the advantage widens in low light where a front sight is hard to find at all.
Rail, Light and Holsters
A Picatinny rail under the dust cover takes a compact weapon light, which turns the Sig Sauer P320 XCompact Romeo X into a credible home defense pistol when it is not on the belt.
Holster support is excellent, including kydex cut for a mounted optic and for light-bearing configurations, so nothing needs a special order.
Modularity and Transfer
The serialized part is the fire control unit, not the frame or slide, so this pistol can become a full-size or a subcompact later by swapping the grip module and slide, without a second FFL transfer.
MAG5 Firearms is a licensed FFL dealer in Pennsylvania. It ships new in the factory case with magazines, the optic installed and documentation, transferred through your local FFL.
Other Sig Sauer P320 XCompact Romeo X configurations and optic-equipped carry pistols are listed in our handgun catalog. Factory specifications are published by SIG SAUER.
Every Sig Sauer P320 XCompact Romeo X sold by MAG5 Firearms ships new in the factory packaging with the accessories SIG SAUER includes, and transfers to your chosen FFL. The Sig Sauer P320 XCompact Romeo X is a regulated firearm and we verify licensing before any order leaves the shop.






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