The SIG Sauer ROMEO-RS PRO is a great-value full-size open-reflex pistol red dot on the DeltaPoint Pro footprint. This model runs a crisp 3 MOA dot — a versatile size balancing precision and speed — behind a 1x31mm window with a distortion-free 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 a bigger dot? See the ROMEO-RS PRO 6 MOA, or a circle-dot in the ROMEO-RS PRO Circle-Dot. Carrying slim? The ROMEO-RS Compact 3 MOA (RMSc). 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 red dot — versatile precision and speed
- 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 (red) |
| Brightness |
8 settings, MOTAC |
| Battery |
CR1632 (side-load, ~20,000 h) |
| Footprint |
DeltaPoint Pro |
| Adjustment Range |
70 MOA W&E |
| Housing |
Steel/polymer hybrid |
What's Included
- SIG ROMEO-RS PRO red 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
Why a 3 MOA dot?
A versatile size — fast up close yet fine enough for precision at distance.
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.
