Circle Dot red
Red Circle Dot, black housing.
Technical Data
Reflex sight · illuminated dot · enclosed
Sig Sauer ROMEO-X Enclosed Compact reflex sight
Fully enclosed reflex sight for pistols with the Shield RMSc footprint, with motion activation, side-loading battery and low deck height.
3, 6 MOA or Circle DotReticle
Shield RMScMounting footprint
34.0 g (1.2 oz)Weight with battery
CR1632Battery
This configuration
Available with a red Circle Dot (black, FDE or ROSE edition), a red 3 MOA dot or a red 6 MOA dot; only the selected version is supplied.
Features in practical use
Fully enclosed
The optical system is enclosed, sealed and argon-purged; a rear glass window closes the housing.
Motion activation (MOTAC)
The sight switches off after 2 minutes without motion and turns back on with the last brightness and reticle setting as soon as it detects movement.
15 brightness settings
There are 12 daylight and 3 night vision settings; the night vision settings are optimized for Gen 3+ night vision devices (D.A.R.C.).
Side-loading battery
The CR1632 battery is changed from the side without removing the sight and without re-zeroing; runtime is up to 20,000 hours (continuous, medium setting, dot only).
Low deck height
With a height of 0.94 in (23.9 mm) the sight allows co-witnessing with standard-height iron sights.
7075 aluminum housing
The housing is made of 7075 aluminum and the lens is aspherical and, according to the manufacturer, distortion free.
Waterproof to IPX-7
The manufacturer rates the sight IPX-7, meaning submersion up to 1 meter.
Torx key adjustment
Elevation and windage are adjusted with the supplied T6 Torx key; one click equals 1.0 MOA. According to the manual total travel is 60 MOA elevation and 70 MOA windage.
Available versions
Version
Included items
- Reflex sight in the selected version
- Operator's manual
- Mounting screws (Torx): M3 and M4
- T6 and T10 Torx wrenches
- CR1632 battery
Matching products
For pistols with the Shield RMSc footprint, for example optic-ready SIG P365 models. According to the manufacturer the sight also mounts without an adapter to selected models from other makers (including Glock G43X and G48, Springfield Hellcat, S&W M&P Shield Plus). The firearm is not included.
* Firearms, mounts and other accessories shown are not included unless they are expressly listed. The selected product variant and the described scope of delivery are decisive.
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Manufacturer according to GPSR
Sig Sauer
Sig Sauer
