Holosun HS510C vs. Sig Sauer Romeo 5 – A detailed comparison


Are you looking to but a red dot device with which to use with your hunting rifle? The Holosun HS510C and the Sig Sauer Romeo 5 red dots promise a high level of precision coupled with ease of use. So, which one of them is better?

Red dot technology has come a long way, and each manufacturer tries to go an extra mile to set themselves apart. When looking for a scope to use on a regular basis, one of the first considerations that come to mind is the level of precision and the ease of use. Having been around a good deal of time, the Holosun HS510C and the Sig Sauer Romeo 5 have managed to cut a niche for themselves in the market, largely owing to their affordability and reliability. Here is a detailed comparison of the two.

What are the differences between the Holosun HS510C and the Sig Sauer Romeo 5?

Holosun HS510C
Sig Sauer Romeo 5
3.3 inches
3.03 inches
2 MOA Dot, 65 MOA circle
Mounting Type
Multi Height Mounting
Multi-height mounting
Objective Lens Diameter
Battery Life
Up to 50,000 hours
Up to 50,000 hours

Holosun HS510C vs. Sig Sauer Romeo 5 – How do they compare?

Optical Features and Characteristics

The Holosun HS510C is an ideal scope for use for people who engage in medium range and long range shooting. It comes with a 24mm optical lens that is an ideal tool for use in both day and night settings. For stable and precise vision, this tool is a non-parallax device, ensuring that you manage to hit your targets with near perfect accuracy. In addition, it comes with unlimited eye relief to ensure that you keep an eye on your target with ease. Additionally, this tool is made using optical glass which has multi-layer coatings which allow for high intensity light transmission while still reducing on glare and wear.

On the other hand, the Sig Sauer Romeo 5 makes an excellent scope for mid-range shooting. Inside it is a 20mm optic lens that works just as well in the day as it does in the night. Additionally, it presents a non-parallax feature that supports high accuracy during use. In addition, it offers unlimited eye relief which helps you to maintain vision on your target even from a tilted angle. The lens comes with anti-reflection characteristics which are important in ensuring that your line of vision is not disrupted by any form of reflected light.

Since the Holosun HS510S comes with a thicker optical lens that also reduces on light glare, it stands out as a better scope than the Sig Sauer Romeo 5 red dot.

Overall Performance

As earlier mentioned, the Holosun HS510C is ideal for medium range and long range shooting. For this reason, it comes with a 2 MOA red dot size, meaning that its red dot covers a diameter of 2 inches from a distance of100 yards. In addition, it also comes with a 65 MOA circle around the red dot. In case you do not fancy the combination, you can use the red dot on its own, or just the MOA circle alone. This latter setting is the most preferred since it keeps your line of vision clear. In addition, this device presents 10 brightness adjustment settings, two of which are made for Night Vision. In addition, you can use add-on magnification devices with this scope without distorting the quality of vision.

On the other hand, the Sig Sauer Romeo 5 makes is better suited to handle short range shooting. This is why it comes with a 2 MOA red dot size. This tool only provides a red dot without an MOA circle for use during shooting. One of its most impressive features is the MOTAC which is Motion Activated Illumination. When your firearm stays more than 10 minutes without being used, this scope goes off, but once it detects the slightest movement, it goes back on. However, unlike the Holosun HS510C, this device is not the most ideal to use with magnifying add-ons. It also comes with 10 brightness adjustment levels.

Since the Holosun HS510C comes with three red dot settings, it makes a better scope than the Sig Sauer Romeo 5.  


Seeing as the Holosun HS510C is made for lengthy outdoor use, it is constructed using aluminum and titanium which make it quite hardy. In addition, it boasts water proof characteristics, resisting water for a period of 30 minutes in a depth of 1 meter. This metal housing also allows it the capacity to work in extremely hot and cold temperatures.

The Sig Sauer Romeo 5 features an aluminum casing that is also made to resist high stress levels. In addition, it is water and dust proof, maintaining peak performance even in unfavorable weather.

The Holosun HS510C features a stronger casing, making it better than the Sig Sauer Romeo 5 red dot.  

Battery Life

When it comes to battery life, the Holosun HS510C delivers up to 50,000 hours. However, when the MOA circle is on, this length of time reduces by more than half, leaving at least 20,000 hours to your disposal. This tool also comes with solar support to ensure you keep using it even when the battery runs out.

The Sig Sauer Romeo 5, on the other hand, comes with a 40,000 hour battery life. This stays constant since the red dot setting is only one, much unlike the Holosun HS510C.

The Holosun HS510C comes with a significantly longer battery life and has solar support, making it a better scope than the Sig Sauer Romeo 5. 

Holosun HS510C vs. Sig Sauer Romeo 5 – A comparison Overview

Holosun HS510C Overview

Holosun HS510C 2 MOA Dot Or A 65 MOA Ring Open Reflex Circle Dot Solar Power Holographic Red Dot Sight
  • The Holosun HS510C New advanced technology LED allows up to 50,000 hours of operation on one CR2032...
  • 2 MOA dot and a 65 MOA ring, Dot only, Ring only, or Dot and Ring reticle combinations
  • Unlimited field of view, Titanium-alloyed, shock resistant hood
  • Powered by both battery and solar

When it comes to long range shooting, this scope works like a champ. What sets it apart from the Sig Sauer Romeo 5 is its red dot and ring combination which gives users several options with which to work in order to experience the best settings.

With a 24mm optic lens, 10 brightness settings (two of which support night mode) and a hardy construction, this device makes certain that your shooting experience is nothing short of incredible. Most impressively, it comes with a 50,000 hour battery life which reduces to 20,000 hours when both the red dot and the ring are on.

It is a considerably small and light device which ensures that you do not have to worry about extra weight. Its water proof and dust proof features place it in a position to work well in all conditions, whether dry, hot, wet or cold.


  • Small and light
  • Comes with 10 brightness levels
  • Water and dust proof
  • Long battery life
  • Comes with red dot and ring option


  • It is somewhat pricey

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Sig Sauer Romeo 5 Overview

Sig Sauer SOR52001 Romeo5 1x20mm Compact 2 Moa Red Dot Sight, Black
  • 2 MOA Red-Dot provides 10 illumination settings (8 daylight plus 2 NV) for visibility in all light...
  • MOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not....
  • Integrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of...
  • Dependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof performance

This scope makes an ideal device for persons who engage in short range shooting on a regular. While it would have been an incredible feature to have both the red dot and the ring, we appreciate that its red dot is quite bright and clear.

With a 20mm optic lens, a 2 MOA red dot size and 10 adjustment settings, this scope makes certain that you receive commendable features as you hunt or shoot for recreation. Two of these brightness settings support night mode for ideal shooting 24/7.

Its body is made using aluminum which ensures longevity and shock absorption even during recoil. In addition, it is water and dust proof and can work even in harsh conditions with ease.


  • Supports nigh mode
  • Water proof
  • 10 brightness adjustment settings
  • Strong casing


  • Does not support long range shooting

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Verdict: So, which one is better – Holosun HS510C or Sig Sauer Romeo 5?

The Holosun HS510C features better optics, a longer battery life and better physical build, making it ideal for long range and lengthy use. With such characteristics, it floors the Sig Sauer Romeo 5 at performance.


  1. Does the Sig Sauer Romeo 5 come with low mount?

Yes, it does.

  1. Does the Holosun HS510C work on a weaver rail?

Yes, it was actually made for a weaver rail.

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Terrence Miller
Terrence Miller is a hunter by birth, picking it up from a lineage of hunters and will probably hand the skill down to his son. He has been hunting since he was a young boy and has knowledge of both the new and old hunting equipment. This goes to say that the information provided is very reliable and conclusive. Using the hunting rifles and getting the right hunting gear seems to be a challenge for many individuals who want to learn the skill of hunting. And the reason why the information presented by Miller has detailed coverage on the different types of rifles, and rifle scopes. When not in the wild hunting, Miller loves horseback riding.


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