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Sig Sauer ROMEO4T Red Dot Sight Ballistic Circle Dot 2 MOA SOR43131

SKU SOR43131-Sig

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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 Details2 MOA Red Dot Ballistic Circle-Dot
  • Objective Lens Diameter:20mm
  • Dimensions:2.65" x 1.6" x 1.4"
  • Weight:3.2 oz.
  • Battery(1) CR2032
  • Battery TypeCR2032
  • Night Vision CompatibleYes
  • Brightness Settings2 NVD 10 Regular
  • Product TypeReflex Sight/Red Dot
  • Item ConditionNew
  • UPC798681585939
  • MPNSOR43131

Customer Reviews

Average Rating
November 2, 2019

After owning several Trijicon MROs (which I still use on regular basis) I decided to try the Romeo 4T for my Sig 516 10" SBR. I am impressed! The quality is readily apparent. Very sturdily built, with a mount that seems to be the equal to the Geissele that I use with my MROs. Love the choice of reticles and the 100,000 hours of battery life. This is a serious, professional level red dot and I highly recommend it.

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March 22, 2023

A great purchase! Practical and effective sight. Not cheap but worth every penny. Sight has everything you need and nothing you don’t. Don’t waste your money on anything else this optic is all you need.

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October 23, 2022

After researching a lot of optic options for my 300 blackout SBR, I came across the Romeo4T, read up as much as I could, and decided to go with it. I currently have about 600 rounds with it and I could not be more happy with this red dot sight. I mainly keep mine on the vertical tri-dot setting, but the option for multiple reticles is very nice to have. The solar powered failsafe is amazing. Shake awake tech works great and is really impressive. Construction is apparent that it can withstand some roughness. Great glass with a very very slight blue tint, and the reticle is clear across every lightning condition. Like I said, I couldn’t be more happy, and I would highly recommend the Sig Sauer Romeo4T - it’s a great product!

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December 3, 2021

Bought the 4T after doing a lot of research on many optics. Put it on a Unity Fast Riser on my SBR 300 blackout and love the combo of the optic/riser. I also like the reticle choices and solar ability.

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