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The Romeo-X Sig-Loc Pro is Sig Sauer's answer to the pistol optic that just won't budge. Instead of bolting on top of the slide, it mounts from underneath using the Sig-Loc footprint, which creates five points of contact between the optic and the slide. That extra grip is the whole point here, keeping your zero honest through heavy recoil and the kind of hard knocks that loosen up lesser sights. The green 6 MOA dot pops fast in bright daylight and gives you a big, easy aiming point for close-in defensive work.
The idea behind Sig-Loc traces back to the mil-spec Romeo-M17 program, and it shows. Because the optic sits low and mounts from below, you get a longer focal length than most enclosed dots, which cuts down on parallax and cleans up the reticle so it looks sharp instead of smeared. The low deck height also means you can co-witness with standard-height iron sights, so your backup plan is always right there in the window. Keep in mind this one is built specifically for slides cut for the Sig-Loc Pro footprint, so confirm your slide is set up for it before ordering.
The housing is CNC-machined 7075 aluminum, fully enclosed and sealed to keep dust, lint, and moisture out of the emitter. It carries an IPX-7 waterproof rating, so rain, sweat, and the occasional dunk won't faze it. The aspherical glass lens keeps the sight picture distortion-free edge to edge.
Running the show is a side-loading CR1632 battery good for up to 20,000 hours, and because it loads from the side you can swap it without pulling the optic off your slide or losing your zero. MOTAC motion activation wakes the dot when the gun moves and powers it down when it sits still, stretching that battery even further. You get 15 brightness settings including dedicated night vision levels, and the whole thing is assembled in the USA and backed by Sig's Infinite Guarantee.
This optic is designed exclusively for slides cut with the Sig-Loc Pro footprint, since it mounts from underneath the slide rather than on top. It won't drop onto a standard DeltaPoint Pro or RMR cut. Check that your slide is set up for the Sig-Loc Pro pattern before ordering, and use Sig's optics compatibility guide if you're unsure.
Yes. The CR1632 battery loads from the side of the optic through a threaded cap, so you never have to remove the sight from your slide to swap it. That means your zero stays put and you're back up and running in seconds.
The 6 MOA dot is a larger, more visible aiming point that's quick to pick up under stress and at close range, which is why a lot of folks prefer it for carry and duty. If you're doing precise work at distance a smaller dot can help, but for fast target acquisition the 6 MOA is hard to beat. Green also tends to read brighter to the human eye than red in daylight.
It's built around a CNC 7075 aluminum housing that's fully enclosed and sealed, with an IPX-7 waterproof rating that handles rain, sweat, and short submersion. The five-point Sig-Loc mount is engineered to hold zero through heavy recoil and hard impacts. It's assembled in the USA and backed by Sig's Infinite Guarantee.
| UPC | 798681732104 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SORX1590 |
| Color | Black |
| Length | 1.90" |
| Magnification | 1x |
| MOA | 6 MOA |
| Model | |
| Power | 1X |
| Product Type | Red Dot |
| Reticle | GREEN DOT |
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