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The Sig Sauer Romeo-X Pro is a 1x24mm pistol red dot built to handle the demands of serious shooters who want reliability without compromise. If you're running an optics-ready P320, P226, or P229, this is the sight engineered for your platform. Sig drew from decades of military-grade red dot development—including the battle-tested ROMEO-M17—to create a compact, tough glass that stays with you through practice sessions, competitions, and defensive training. The open-emitter design keeps things lightweight and durable, while the illuminated green circle-with-dot reticle cuts through clutter and picks up fast on target.
What sets the Romeo-X Pro apart is its thoughtful engineering. The low 0.94-inch deck height lets you maintain a true co-witness with standard iron sights, so you can run backup irons without compromise. Motion-activated illumination (MOTAC) stretches battery life to an impressive 20,000 hours—that's over two years of continuous runtime on a single CR1632 cell. You get 12 daytime brightness levels plus 3 night vision settings, giving you the flexibility to dial in exactly what you need in any light. CNC-machined 7075 aluminum housings and a patent-pending beryllium copper flexure arm mean this sight was built to absorb recoil and maintain zero through hard use.
The RX footprint mount is direct—no adapter rings, no guesswork. The side-load battery compartment is intuitive and doesn't clutter your sight picture. Sig assembles these in the USA and includes everything you need to mount it right: two Torx wrenches, three mounting screw options to fit your slide, and a fresh battery. Total elevation and windage travel of 80 MOA gives you plenty of adjustment room. This is a sight that respects your skill and your gear.
| Mount Type | Top Mount (RX Footprint PRO) |
| Magnification | 1x |
| Objective Lens Diameter | 24 mm |
| Height | 0.94 in (23.88 mm) |
| Overall Length | 1.83 in (46.48 mm) |
| Overall Width | 1.15 in (32.60 g) |
| Reticle | Illuminated Green Circle with Dot |
| Illumination Settings | 12 Daytime + 3 Night Vision |
| Windage Adjustment Range | 80 MOA |
| Elevation Adjustment Range | 80 MOA |
| Battery | 1x CR1632 |
| Run Time | 20,000 hours |
| Emitter | Open |
The Romeo-X Pro uses the RX footprint and is designed for Sig Sauer optics-ready pistols, including the P320, P226, and P229 families. Always verify your specific model is optics-ready and compatible with the RX footprint before purchasing.
Yes. The low deck height of 0.94 inches allows for a true co-witness with standard-height iron sights, so you can maintain your irons as a backup.
You get the Romeo-X Pro sight, operator's manual, three pairs of mounting screws (M3, M4 9.25mm, and M4 8.75mm), a T10 Torx wrench, a T6 Torx wrench, and one CR1632 battery.
The Romeo-X Pro delivers 20,000 hours of runtime on a single CR1632 battery. Motion-activated illumination (MOTAC) helps maximize battery life by only powering the reticle when motion is detected.
SKU: 194198555