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Sig Sauer Romeo4H 1x20 2 MOA Circle Plex Red Dot Sight SOR43012

SKU SOR43012-SigSauer

List Price $270.99
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Tough and built like a tank, the Sig Sauer ROMEO4 red dot sight is fast, accurate, and a great representative of Sig Sauer quality. For close quarters battle (CQB), competition, or even hunting dangerous game when milliseconds count, count on the ROMEO4 to get rounds on target as fast as possible. ROMEO4 red dot sights come in the following varieties:


ROMEO4 red dot sights also incorporate these features:

  • MOTAC - Motion-sensing technology immediately powers up illumination when motion is detected, and powers it down when it does not - saving battery life and ensuring power is there when needed.
  • Stealth ID - the industrial design of Sig Electro-Optics is based on their legendary firearms; deflection armor trapezoidal surfacing breaks up shape and pattern of the optic
  • Spectracoat - Highly efficient, ultra-wide broadband, anti-reflection lens coatings minimize reflection across the spectrum of visible light, while still permitting maximum light transmission through the scope
  • Sig Optics Infinite Guarantee - They're guaranteed forever - an unlimited lifetime guarantee. Fully transferable, no warranty card or receipt required. Period.

About Sig Sauer

From humble beginnings as a wagon to factory to one of the world’s largest firearms, optics, and ammunition manufacturers; the history of Sig Sauer is rich in innovation and achievement. After winning a contract from the Swiss government in 1864 for their Prelz-Burnand muzzleloading rifles, the Swiss Wagon Factory change its name to Schweizerische Industrie-Gesellschaf, the Swiss Industrial Company, better known as SIG. In 1949 SIG developed the SIG P49, the predecessor to the P210 and continued developing small arms for the Swiss military and police.

Since then the company has changed its name, acquired other firearm manufacturers, and crossed the Atlantic—setting up headquarters in New Hampshire. However, what hasn’t changed is the innovative spirit that has driven SIG SAUER to develop firearms like the SIG516 rifle, MCX rifle, P320 pistol, and P226 pistol. With clients like the Texas Rangers, United States Secret Service, Navy Seals, and dozens of local law enforcement agencies nationwide; SIG SAUER is there When It Counts.


  • Magnification Range:1x
  • Reticle Details1 MOA Red Dot Ballistic CirclePlex
  • Objective Lens Diameter:20mm
  • BatteryCR2032
  • Battery TypeCR2032
  • Night Vision CompatibleYes
  • Brightness Settings2 NVD 10 Regular
  • Product TypeReflex Sight/Red Dot
  • Item ConditionNew
  • UPC798681567850
  • MPNSOR43012

Customer Reviews

Average Rating
January 1, 2020

Used this optic paired with the Juliet 4 power magnifier at a recent 2 day tactical carbine course. My rifle and equipment were driven hard during those two day. Sig equipment performed like a champ!

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March 30, 2023

It is a decent sight for the money. Even though it is cheaper I find I actually like the Romeo 5 XDR better. Additionally, I find the circle dot of the XDR much easier for me to see than the circle plex I got in the 4H. The plex just looks fuzzy to me, unless I use a magnifier - then it is good, so I know it my eyes and not a problem with the sight. If I were to do it again though, I would go with a 4T (and circle dot) which is an upgraded version of this sight.

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May 21, 2022

The service Euro Optic gave was excellent. Fast shipping, lots of products to choose from and excellent pricing. The sight is well made with 7075-t6 aluminum, the turrets click very solidly and the buttons are stiff enough to not get bumped up and down accidentally. Sig only including a true cowitness mount without some kind of riser was disappointing. I ended up ordering a lower 1/3 mount, which is a T2 footprint but matches to the sig body a little awkwardly due to Sigs insistance on being unique while still using the same mounting system. I was a little disappointed at first when I realized I had ordered the circleplex reticle with a crosshair around a 1moa dot instead of the more traditional 2moa dot, this was my own mistake, but after receiving the sight I'm more than satisfied. My eye picks up the crosshair quite well without magnification, it acts like a bigger dot than it is and for me works better than a regular 2moa dot. The reticle is extremely clean under magnification. The crosshair seems to work better for my eyes, something I didn't expect. The small center dot stays extremely small under magnification for fine aiming. I can see some people saying the crosshair will cover too much of the target but that doesn't seem to be an issue for me at the distances I'm looking to use this sight. Considering I ended up paying significantly less for this sight due to it having the less desirable reticle, I'm kinda glad other people don't seem to like it.

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January 10, 2019

Really slick little sight and love the fact I can easily get batteries just about anywhere, vs. specialty batteries. My only disappointment is it's not a true red dot, but rather a red "crosshair"/crosshair circle, but still gives plenty fine enough aiming point without a magnifier, to be reasonably accurate at a 100 yards out of a Virtus.

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