The SIG Sauer ROMEO-RS Compact green-dot is a lightweight open-reflex pistol optic on the slim RMSc footprint — purpose-built for compact carry pistols, with a high-visibility green reticle. This model runs a crisp 3 MOA green dot behind a 1x24mm 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 it light for carry.
How It Compares
Prefer red? See the Compact 3 MOA red. Want a bigger green dot? The Compact Green 6 MOA. Read green vs red dot sights. It fits the RMSc footprint — browse all pistol dot sights.
Compatibility
RMSc (Shield) footprint — fits RMSc-cut carry pistols (P365 family, Glock 43X/48, Hellcat, Shield Plus and others). Confirm your slide cut before ordering.
Key Features
- 3 MOA green dot — high visibility, carry size
- Slim 1x24mm window; aspheric glass lens
- RMSc footprint; MOTAC; 8 brightness settings
- Side-load CR1632 tray (up to 20,000 h)
- Hybrid steel/polymer housing
Technical Specifications
| Magnification |
1x |
| Aperture |
24 mm |
| Reticle |
3 MOA dot (green) |
| Brightness |
8 settings, MOTAC |
| Battery |
CR1632 (side-load, ~20,000 h) |
| Footprint |
RMSc (Shield) |
| Housing |
Steel/polymer hybrid |
What's Included
- SIG ROMEO-RS Compact 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 Compact optic.
Which pistols does it fit?
RMSc-cut carry pistols — the P365 family, Glock 43X/48, Hellcat and others.
Battery swaps?
The CR1632 side-loads, so you keep your zero.
