The SIG Sauer ROMEO-M17 is a fully enclosed pistol red dot purpose-built for SIG M17/M18 (MHS) pistols. The sealed, gas-purged optical system shrugs off moisture, dust and debris, while SIG's SIG-LOC bottom-mount interface locks it directly to compatible M17/M18 slides.
It offers a selectable 2 MOA dot / 32 MOA circle reticle, MOTAC and MAGNETAC activation, D.A.R.C. night-vision tech, a side-loading CR2032 tray and IPX8 sealing.
Important compatibility note: this optic fits SIG M17/M18 military, surplus and commemorative pistols with the MHS single-screw slide — it does not fit standard commercial P320 slides.
How It Compares
For an open-emitter optics-ready optic, see the ROMEO-X Pro. Browse the wider SIG ROMEO range, more sealed optics in enclosed red dot sights, and all pistol dot sights. Why enclosed? Read enclosed vs open red dots.
Key Features
- Fully enclosed, sealed and gas-purged optic
- Purpose-built for SIG M17/M18 (MHS) pistols via SIG-LOC mount
- Selectable 2 MOA dot / 32 MOA circle / circle-dot
- MOTAC + MAGNETAC activation; D.A.R.C. NV tech
- Side-loading CR2032 tray; IPX8 waterproof
- Loaded-chamber gas deflector, anti-reflection grooves
Technical Specifications
| Magnification |
1x |
| Aperture |
24 mm |
| Reticle |
2 MOA dot / 32 MOA circle (red) |
| Brightness |
15 (12 day / 3 NV) |
| Battery |
CR2032 (side-loading) |
| Mount |
SIG-LOC (M17/M18 MHS only) |
| Waterproof |
IPX8 |
| Weight |
1.54 oz |
| Warranty |
SIG Infinite Guarantee |
What's Included
- SIG ROMEO-M17 enclosed red dot
- CR2032 battery, mounting screw, dust cover, threadlocker, manual
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
Will it fit my P320?
No — the ROMEO-M17 is for SIG M17/M18 (MHS single-screw) slides, not standard commercial P320 slides.
Is it enclosed?
Yes — a fully sealed, gas-purged emitter for maximum reliability in all conditions.
What reticle options are there?
A selectable 2 MOA dot, 32 MOA circle, or circle-dot combination.
