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Sig Sauer 1x20mm Compact Red Dot Sight (Romeo5)

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Quick Overview

Sig Sauer Romeo5 1x20mm Compact Red Dot Sight.
Sig Sauer 1x20mm Compact Red Dot Sight (Romeo5)

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ROMEO5 Comparison Video:

Sig's ROMEO5 red dot sight is a small, lightweight enclosed red dot sight. The Romeo5 features Sig's MOTAC system (motion activated illumination) which turns the sight off when it is not in use. It activates instantly when it detects the slightest vibration or movement. The feature helps drastically extend the battery life of the sight.

The ROMEO5 includes a total of two risers, one is a low mount riser and one is a 1.41 inch riser (pre-mounted on the Romeo5 in the box) to co-witness with iron sights.

The ROMEO5 will mount on any platform and the solid aluminum design will give peak performance and years of service. Military units trust the ROMEO5 when it counts, so why wouldn’t you?

The ROMEO5 Compact Red Dot Sight provides the civilian and armed professional with a robust 1x aiming solution optimized for today’s MSR/AR platforms.

  • The ROMEO5 combines a leading edge optical design with an extremely robust, lightweight aluminum housing for years of worry-free service at a competitive price point
  • The 2 MOA Red-Dot provides 10 illumination settings (8 daylight plus 2 NV) for visibility in all light conditions
  • Features our MOTAC™ (Motion Activated Illumination) powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced battery life
  • The readily available CR2032 battery is side-loading, allowing for quick battery replacement without having to remove the sight from the firearm
  • An integrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of applications
  • Dependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof performance
  • Includes a M1913 Picatinny low mount riser and a co-witness 1.41” riser mount

We have received a few inquiries from customers regarding the Romeo5 and there are a couple things to check if you buy a new Romeo5 and it does not appear to be working:

  • First, make sure the battery is installed correctly with the + facing away from the scope (the + side should be visible when the battery is installed)
  • Next, press and hold the + or - button for about two seconds to activate the sight and then press the + button about six to eight times to ensure the dot is visible (sometimes it is set so low it doesn't appear to be visible but is indeed on).
  • MOTAC is the motion activation feature of the Romeo5 and is very sensitive. The most minor vibration will activate it. We tested it and found that the vibration from a speaker on a desk while the optic is sitting on the desk is enough to activate it.
  • The Romeo5 uses a CR2032 battery that should last a long time. If you are burning through batteries quickly, make sure something isn't vibrating or touching the optic to frequently cause it to activate (for example if it is in a vehicle, it will always activate from the vibration of the engine and driving).

Additional Information

SKU SOR52001
UPC Code 798681553396
Caliber No
Manufacturer Sig Sauer
Trigger Pull SA No
Trigger Pull (DA) No
Overall Length No
Overall Height No
Overall Width No
Sights (detailed) No
Sight Radius No
Weight Empty No
Grips No
Frame Finish No
Frame Material No
Slide Finish No
Stock Material No
Barrel Length (in) No
Rifling No
Number of Grooves No
Mag Capacity / Rounds No
Number of Mags No
Sound Reduction No
Accessory Rail Not Applicable
Features No
Safety (detailed) No
Competition Approval No
Magazine Well No
Additional Info No
Bullet Type No
FFL Requirements No
Warranty Warranty provided by Sig Sauer. Warranty information is available for Sig Sauer products at

Product Questions

Product Questions

How does MOTAC work? My Romeo5 doesn't seem to turn off like it should.

The Romeo5 and other Sig Electro Optics that have MOTAC (Motion Activated Illumination) are very sensitive to any motion or even vibration.

From Sig Sauer: MOTAC increases battery life by shutting down the system when not in use and instantly activates the system when it senses the slightest vibration or movement. Your sight will be up when you go into action. The ROMEO5 will mount on any platform and the solid aluminum design will give peak performance and years of service.

We have sold thousands of Romeo5 optics and have never seen one that had a defective MOTAC feature. To test the MOTAC feature, turn on the optic and place the optic on a solid surface that has no vibration (a table top, desk, or chair) in a manner in which you can look through and see the dot without having to move or touch the optic. Ensure that there is nothing which might create a vibration and let the optic sit for approximately one minute. The reticle should turn off. You can look through the optic and see that the Romeo5 shuts itself off. If you tap or even slightly move the optic, it will turn back on.

Very slight vibrations, even those from an incandescent light (a customer tested his on the shelf of his safe and an incandescent light was mounted on the underside of the shelf) can prevent the sight from shutting itself off.

Referenced product: SOR52001

Applies to Sig optics featuring MOTAC including most if not all: Romeo1, Romeo3, Romeo4, Romeo5, Romeo6

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I just received my Romeo5 and it doesn't seem to work. What should I do?

Referenced product: SOR52001

There are a few steps to troubleshoot the Romeo5 to verify if it is functioning properly.

First, please check to ensure the battery is installed properly. The positive terminal should face away from the optic as shown:

Sig Romeo5 Battery Installation

Next, press and hold the + button on the top of the Romeo5 for approximately three seconds to activate it. It is possible that the intensity is turned down very low where the dot is difficult to see. Press the + button five to ten times to check if the dot becomes visible.

Last, if these steps do not work, it is recommended to test another battery, if you have one available. The Romeo5 uses a CR2032.

If you still have problems after trying the steps above, we recommend calling Sig Sauer's support staff by calling 603-610-3000 (option 1).

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will riding in rouge pastures attivate the motac

Referenced product: SOR52001

Response Date: Feb 26, 2019

Yes. Even very minor motion (tapping the sight lightly) will activate MOTAC. It is meant to turn off when the firearm is set down and activate with any slight movement.

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Is this item New or refurbished

Referenced product: SOR52001

Response Date: Sep 26, 2019

These are new and not refurbished.

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Customer Reviews

Excellent Value Review by Griff
I have two Romeo 5 optics. For me, they are the perfect balance of quality and price. No doubt there are better optics out there, but you pay for it and most of us simply don't need one that costs $600-$800. For me, the SIG Romeo 5 is clear, holds it's zero and works every time. A big selling point is the motion activated illumination, allowing me to leave it turned on most of the time. It's always ready when I need it. In addition, Osage County Guns had a great price and shipped it to me lightning fast; I was very impressed and I recommend them highly. In all, it was a great value and experience! (Posted on 5/18/2020)
Cant beat it for the price ill be buying another ........ Review by joe
cant beat it for the price i'll be buying another...... (Posted on 4/27/2020)
Great product, price, and prompt delivery Review by DANIEL
Would definitely buy from Osage again. Easy transaction. Sight was exactly as expected. (Posted on 4/26/2020)
Great red dot. Price was even better. Review by Cord
Can’t beat the quality of this red dot. Price is Excellent. Will buy another one in the future (Posted on 4/22/2020)

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