Sig Sauer Electro-Optics SORX1570 Romeo-X Sig-Loc Pro Black 1x24mm Illuminated Green Circle w/Dot Reticle RX Footprint Mount

The Sig Sauer Romeo-X with SIG-LOC Pro mounting is a 1x24mm pistol red dot built around a five-point contact system that locks your optic to your slide with the rigidity of iron. If you're running a Sig-compatible pistol and want a compact reflex sight that stays zeroed through hard use, this green circle-dot reticle model delivers the low-profile, rock-solid platform that separates modern duty optics from budget carry sights. The SIG-LOC footprint is the result of lessons learned from the MIL-SPEC ROMEO-M17, and it shows: instead of the traditional two-point top mount, Sig engineered a bottom-contact design that creates five distinct pressure points and eliminates the shift in zero that comes from recoil shock and impact.

What makes the SIG-LOC geometry smart is the longer focal length it enables. By moving the contact points down and spreading them out, Sig reduced parallax distortion dramatically—you get a crisp, forgiving reticle that doesn't swim when your sight picture shifts slightly off-axis. That matters on a handgun where sight radius is short and your eye position naturally varies. The optic sits at 0.96 inches in height, low enough to co-witness with standard iron sights, so you're not forced into an either-or decision. The housing is 7075 aluminum, fully sealed to IPX-8 waterproofing, and the glass is aspherical and distortion-free—real glass, not cheap plastic elements.

Battery life is rated at 20,000 hours on a single CR2032 (side-loaded, so no fiddling with the optic body). You get 15 illumination settings: 12 for daylight use and 3 dedicated night-vision modes. The Circle-Dot reticle is visible in bright sun and low light alike. MOTAC (Motion Activated Illumination) auto-powers the dot when the gun moves and shuts it down to save battery in your safe. This optic is assembled in the USA and backed by Sig's Infinite Guarantee—confidence that comes from engineering, not marketing.

Note: SIG-LOC Pro is the new footprint standard. Slides cut for SIG-LOC will still accept traditional top-mount reflex sights if you ever need to swap, but you'll maximize performance when running a SIG-LOC optic on a compatible slide.

Key Features

• Five-point SIG-LOC Pro contact system for zero-shift lockup under recoil
• 1x magnification with 24mm objective for quick target acquisition
• Green illuminated Circle-Dot reticle, visible in daylight and low light
• Longer focal length reduces parallax and reticle distortion
• 0.96-inch height co-witnesses with standard pistol iron sights
• 15 illumination settings including 3 night-vision modes
• MOTAC (Motion Activated Illumination) for battery conservation
• 20,000-hour battery life on single CR2032
• IPX-8 waterproofing with fully sealed optical system
• 7075 aluminum housing with aspherical, distortion-free glass
• Side-load battery compartment
• Assembled in USA, backed by Infinite Guarantee

Specifications

Frequently Asked Questions

Which Sig pistol slides are compatible with the SIG-LOC Pro footprint?

The SIG-LOC Pro (RX footprint) is designed for Sig pistols configured with SIG-LOC mounting cuts. Check your slide or Sig's documentation to confirm SIG-LOC compatibility. Slides with SIG-LOC cuts remain compatible with traditional top-mount reflex sights as a backup option.

Can I use this red dot on a pistol with a standard (non-SIG-LOC) mounting footprint?

No. The Romeo-X with SIG-LOC Pro mounting requires a slide cut for the SIG-LOC footprint. It is not compatible with standard RMR, ACRO, or other top-mount reflex sight cuts.

What reticle options are available for this model?

This specific model features a green illuminated Circle-Dot reticle. Sig also offers the Romeo-X in 3 MOA Red Dot and 6 MOA Red Dot configurations, but those are different SKUs.

What is included in the box?

The facts provided do not specify what accessories or documentation are included. Contact Bosque Outdoors directly to confirm what ships with this optic.

How long does the battery last, and is it easy to replace?

Battery life is rated at 20,000 hours on a single CR2032 coin cell. The battery loads from the side of the optic body, so you don't have to remove it from your slide to swap it out.