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 bold 6 MOA dot — the quickest to find under stress and ideal for close-range defensive shooting — 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
Want a finer dot? See the ROMEO-RS PRO 3 MOA or circle-dot version. Carrying slim? The ROMEO-RS Compact (RMSc). Browse the SIG ROMEO range and all pistol dot sights; see best optics for concealed carry.
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
- Bold 6 MOA red dot — fastest to acquire up close
- 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 |
6 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 6 MOA dot?
The larger dot is the quickest to pick up under stress — excellent for close-range defensive use.
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.
