The SIG Sauer ROMEO-X Compact Red Dot Sight is a premium open-reflex red dot sight for slim carry pistols on the RMSc footprint — purpose-fit for the SIG P365 family and other RMSc-cut handguns. A distortion-free aspherical lens and low deck height give a clean, co-witnessable sight picture.
It offers a selectable 2 MOA dot / 32 MOA circle reticle, MOTAC + MAGNETAC activation, 15 brightness settings (3 night-vision), a side-loading CR1632 tray, and IPX7 sealing.
How It Compares
Larger pistol? The ROMEO-X Pro uses the DeltaPoint Pro footprint. It fits the slim RMSc footprint — confirm your slide cut in our RMR vs RMSc guide. Browse the SIG ROMEO range and all pistol dot sights. Carry setup? See best optics for concealed carry.
Compatibility
RMSc (Shield) footprint — SIG P365 family, plus SIG-listed direct fit on Glock 43X/48, Springfield Hellcat/Hellcat Pro, S&W Shield Plus/Equalizer, Taurus TX22, Canik Mete MC9 and FN Reflex. Confirm slide cut and screws before ordering.
Key Features
- Selectable 2 MOA dot / 32 MOA circle / circle-dot
- RMSc footprint for compact carry pistols
- Distortion-free aspherical lens, low deck height
- MOTAC + MAGNETAC activation; 15 settings (3 NV)
- Side-loading CR1632 tray; 7075 aluminium, IPX7
Technical Specifications
| Magnification |
1x |
| Aperture |
24 mm |
| Reticle |
2 MOA dot / 32 MOA circle (red) |
| Brightness |
15 (12 day / 3 NV), MOTAC |
| Battery |
CR1632 (side-loading), ~20,000 h |
| Footprint |
RMSc (Shield) |
| Housing |
7075 aluminium, IPX7 |
| Weight |
~1.0 oz |
What's Included
- SIG ROMEO-X Compact red dot sight
- Mounting screw kit, T6 & T10 Torx wrenches, CR1632 battery, 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
Which pistols does it fit?
RMSc-cut carry pistols — the SIG P365 family, plus Glock 43X/48, Hellcat, Shield Plus and others. Confirm your slide cut.
Open or enclosed?
This is open-emitter; for a sealed M17/M18 optic see the ROMEO-M17.
Does it co-witness?
Its low deck height supports co-witness with standard-height irons on compatible pistols.
