Sig Romeo 4 vs Romeo 5 – Selecting the Best Optic


Getting a high-quality red dot for your rifle can prove to be a difficult process especially if you are determined to purchase an ideal sight. The Sig Romeo industry is a big brand known for releasing high standard products guaranteed to benefit shooters.  

Today’s market is filled with a variety of red dots that are designed with  different features and functions. Both the Sig Romeo 4 and Sig Romeo 5 were released at the same time and they are popularly known for their great quality. These sights share a brand name, however, they do not have similar features and functions.

As a hunter before I purchase my next red dot optic, I like to hand test everything. This includes the reliability, the reticle, the precision, the battery life, and the mounting. After all these tests I am able to pick out the sight that will suit me best.

What are the differences between and Sig Romeo 4 vs Romeo 5

Sig Romeo 4
Sig Romeo 5
This is the ultimate red dot sight with a quick and precise target acquisition function. It performs well in all kinds of weather conditions, lighting conditions and terrain.
This sight is guaranteed to provide professionals with an aiming solution. The eye relief is unlimited giving you the chance to aim at your target no matter your position. It is resistant to factors such as water and fog.
Lens Diameter
Reticle Adjustments
0.5 MOA per click
2 MOA not adjustable
Solar Power
Reticle Options
Battery Life
100,000 hours
50,000 hours

Sig Romeo 4 vs Romeo 5 – How do they Compare?

Battery Life 

Romeo 4 is designed with solar-powered functions which is ideal. These functions are activated automatically in areas where there is a lot of light and the battery functions in environments where there is low light. This factor allows the battery of the Romeo 4 to function for up to 100,000 hours at an average setting.

The Romeo 5 makes use of the CR2032 battery that is placed into the scope’s side. This means that the sight does not have to be disconnected when installing a brand-new battery. Romeo 5 can operate for up to 50,000 hours at an average setting. The fact that Romeo 4 is designed with solar power functionalities, and it can run for 100,000 hours makes it a better option than Romeo 5. 

Minutes of Angle 

The MOA of your sight is yet another element that you must put into consideration when comparing Romeo 4 and 5. Romeo 4 provides you with a convertible rate of 0.5 MOA per click. Shooters can increase or decrease these measurements depending on their needs. Romeo 5 is designed with a 2 MOA that cannot be adjusted. Therefore, shooters can only function with the 2 MOA module. An adjustable module is preferred because it improves your aim and enhances your performance while out on the field. If you are looking for a more flexible sight that is better on the field, Romeo 4 is a better option than Romeo 5.

Reticle Options 

When it comes to the reticle dot, Romeo 4 is designed with four different choices. There is the basic traditional dot, crosshairs (this is the dot that has holds) circle dot (the dot that is designed with a circle around it) as well as circle dot with holds. These settings are the most preferred amongst shooters. Romeo 5 is only designed with a traditional red dot. Romeo 4 is better than Romeo 5 because shooters get the chance to implement more than one variable when out in the field.  

Sig Romeo 4 vs Romeo 5 – A Comparison Overview 

Sig Romeo 5 

Sig Sauer Romeo5 1x20mm Compact Red Dot
  • Sig Sauer Romeo5 Compact Red Dot Sight - SOR52010

This sight is of great quality especially when it comes to its production and the terms of use. It is much smaller than the Romeo 4 and it is  light in weight making it one of the most popular optics in the market. It is designed with an aluminum coating and this ensures that it is strong and dependable. These factors come in handy especially when you are exposed to harmful external factors. The sight operates on single AAA batteries, and the battery life lasts for up to 50,000 hours.


Romeo 5 comes with Picatinny mounts making it a great choice for a variety of rifles and shotguns. The Motion Activated Illumination (MOTAC) function works as a battery saving feature. This is nice especially because of the lack of solar-powered functionalities.


  • It is affordable
  • Designed with strong and durable material
  • Resistant to factors such as shock and water


  • Does not come with additional features like the Romeo 4
  • Does not have any kind of solar-powered features.

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Sig Romeo 4 

Sig Sauer SOR43021 Romeo4S Red Dot, Black
  • Solar powered red dot sight with 100,000+ battery life
  • 2 MOA Red Dot Ballistic Circle Dot
  • Designed for modern semi-automatic pistols, MSR platforms and shotguns
  • Extremely strong and light CNC aluminum housing

Romeo 4 is one of the most ideal red dot sights and it is available at an affordable price. It has a rugged package making it function well in all types of climatic conditions and environments. The durability makes it resistant to external factors such as water and fog. You can get to enjoy an infinite level of eye relief from the 20 mm diameter optic. Romeo 4 makes use of a 1x magnification level and it also incorporates 10 different brightness settings making it ideal for hunting activities in the night and day.

One of the best features of this sight is the versatility of the MOA. The 0.5 variable can be adjusted and this allows you to select your preferable scope when it comes to the reticle elements. It also comes with four different options for all your targeting activities. This includes the circle-dot, red-dot, red-dot with handles as well as a circle dot with crosshairs.

This sight is also designed with solar-powered capabilities that improve battery life. It comes with a very large knob which is ideal especially when you are making modifications. The transparent lens cover is great as you do not have to open it up when trying on a rapid-fire movement.


  • It comes with additional functions and features unlike other Romeo models
  • The lens covers are transparent
  • Four different reticle options


  • It costs more than many other Romeo models in the market
  • The night vision settings are limited.

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The Sig Romeo industry did not design both sights with very many different features and factors. Romeo 4 is an improved version of Romeo 5, however, it is much heavier. On the other hand, Romeo 5 is more affordable than Romeo 4 but the short battery life makes it a less ideal option.

Verdict: So, which is better – Sig Romeo 4 or Romeo 5?

Romeo 4 proves to be the better option than the Sig Romeo 5. This sight is designed with amazing solar-powered functionalities that come in handy especially when it comes to maintaining battery life. The reticle settings can be easily modified allowing shooters to enjoy the experience.

Frequently Asked Questions

  1. Is the Romeo 5 model designed with any solar power capability?

No, it is not. Users will have to go through other Sig Sauer options to benefit from this element.

  1. Do all of the Sig Romeo 4 models have the same design?

No. The models have a few different features. For example, the 4DR and 4H do not come with any solar power substitutes.


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