The SIG Sauer ROMEO-RS PRO green-dot is a great-value full-size open-reflex pistol optic on the DeltaPoint Pro footprint. This model runs a crisp 3 MOA green dot — many shooters find green appears brighter and faster to acquire — behind a 1x31mm window with an aspheric glass lens.
SIG's MOTAC motion-activated illumination keeps it ready, with 8 brightness settings and a side-loading CR1632 tray (up to 20,000 hours). The hybrid steel/polymer housing keeps weight down.
How It Compares
Prefer red? See the ROMEO-RS PRO 3 MOA red. Want a bigger green dot? The PRO Green 6 MOA. Read green vs red dot sights. Browse the SIG ROMEO range and all pistol dot sights.
Compatibility
DeltaPoint Pro (DPP) footprint — fits DPP-cut slides and optics-ready pistols with a DPP plate. Confirm your slide cut/plate before ordering.
Key Features
- 3 MOA green dot — high visibility, versatile size
- Full-size 1x31mm window; aspheric glass lens
- DeltaPoint Pro footprint; MOTAC; 8 brightness settings
- Side-load CR1632 tray (up to 20,000 h)
- Hybrid steel/polymer housing
Technical Specifications
| Magnification |
1x |
| Aperture |
31 mm |
| Reticle |
3 MOA dot (green) |
| Brightness |
8 settings, MOTAC |
| Battery |
CR1632 (side-load, ~20,000 h) |
| Footprint |
DeltaPoint Pro |
| Housing |
Steel/polymer hybrid |
What's Included
- SIG ROMEO-RS PRO green dot sight
- CR1632 battery, documentation
UK Delivery & Support
UK-stocked and dispatched tracked from our UK warehouse — no import duties or customs delays — backed by UK-based support and SIG's Infinite Guarantee.
Frequently Asked Questions
Green or red?
Many shooters find green appears brighter; otherwise it's the same ROMEO-RS PRO optic.
What footprint is it?
DeltaPoint Pro — fits DPP-cut slides and optics-ready pistols with a DPP plate.
Battery swaps?
The CR1632 side-loads, so zero is retained.
