Sig Sauer Romeo 4 vs. Romeo 5 Review (2020)

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This is the only Sig Sauer Romeo 4 vs. Romeo 5 review you’ll ever have to read.

In fact:

I bought both red dot sights and hand-tested everything: battery life, durability, reticle, accuracy, mounting, and so much more.

By the end of this review, you’ll know which red dot is for you.

Let’s get started!

Sig Sauer Romeo 4

The Sig Sauer Romeo 4 is a full package (with a full price tag).

Forged out of aluminum, this rugged optic offers quality performance and tons of add-ons.

It has 1X magnification and a 20mm objective lens, making it superb for encounters within 100 yards. 

Sig Sauer Romeo 4 Red Dot Sight
Via: Sportsmansnewstv

You can choose from a ballistic circle dot (circle with a dot in the center) or a ballistic circle quadplex (cross hairs added into the circle).

Romeo 4 reticle
Via: Sportsmansnewstv

You also have four options to choose from with the reticle. You can switch between dot, circle-dot, dot with holds, or circle-dot with holds. 

The optic is also small and allows for unlimited eye relief (Just like the Fastfire 3 and Venom red dots).

Romeo 4 glass clarity
Via: Sportsmansnewstv

The sight is 2 MOA and can be adjusted easily. The amount of options for the reticle and the ease of adjusting makes this a great optic if you are trying to hit closer to the 100-yard mark.

But the variety of reticle options is not the only notable feature.    

The power system on this optic is what is impressive. It’s solar operated in high light areas and battery-powered in low light or night settings.

This means the battery will last up to 100,000 hours depending on the environment and settings you use.

Romeo 4 battery
Via: Sportsmansnewstv

It even comes with 8 daylight settings and 2 night vision settings for versatility.    

In addition, it comes with MOTAC (motion activation illumination). This feature turns the optic on when it senses motion and shuts off when it’s idle for 10 minutes. This helps conserve battery life for even longer. 

Even though there is a lot of tech in this optic, it is rugged and durable. It’s IPX-7 rated, meaning its waterproof in up to one meter of water.

Romeo 4 waterproof
Via: Sportsmansnewstv

It also is fog proof and has fixed lens caps. The lens caps are transparent and do not have to be flipped up when in use.

Romeo 4 transparent cover
Via: Sportsmansnewstv

This allows for use in rougher environments, whether it be heavy rain, snow, hot, or cold. Not only is it rugged, but it attaches easily to most firearms with picatinny rails. 

Sig Sauer SOR43021 Romeo4S Red Dot, Black
44 Reviews
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

There are a lot of frills on the Romeo 4, but let’s look at its little brother… 


Sig Sauer Romeo 5

The Sig Sauer Romeo 5 may not be as loaded as the Romeo 4, but it comes with a more affordable price.

Sig Sauer Romeo 5 Red Dot Sight
Via: Alabama Arsenal

This is made from aluminum as well and has 1X magnification with a 20mm objective lens. This is great for shooting within 100 yards.

Romeo 5 optic
Via: LejarazuSport

The reticle is one fixed dot that is 2 MOA and is adjustable. This optic is smaller than the Romeo 4 and allows for unlimited eye relief. 

Romeo 5 Reticle
Via: C_DOES

There are 10 illumination settings to choose from, 2 of which are night vision. It comes with MOTAC to help save the battery life. Depending on the setting used, the battery could last up to 50,000 hours.

That’s crazy because the battery life on my EOTech 512 holographic sight is around 1,000 hours.

Romeo 5 glass
Via: LejarazuSport

Like its counterpart, the Romeo 5 comes IPX-7 rated and fog proof for superior performance in all terrains. 

Sig Sauer SOR52001 Romeo5 1x20mm Compact 2 Moa Red Dot Sight, Black
3,203 Reviews
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 conditions
  • MOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced 40,000+ hour battery life
  • Integrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of applications

With all that said…   


Which is better Sig Sauer Romeo 4 or Sig Sauer Romeo 5?

It boils down to application.

If you’re looking for a solid beginner’s red dot sight that’s great for range plinking, close-range shooting or for defensive use, get the Sig Suaer Romeo 5

Sig Sauer SOR52001 Romeo5 1x20mm Compact 2 Moa Red Dot Sight, Black
3,203 Reviews
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 conditions
  • MOTAC (Motion Activated Illumination) powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced 40,000+ hour battery life
  • Integrated M1913 Picatinny interface provides industry-standard mounting options for a wide range of applications

However, if you’re an experienced red dot user that’s looking for a more premium red dot sight, get the Sig Sauer Romeo 4. It has more practical uses (i.e. hunting, patrol, etc.) and will give you more versatility at different ranges.

Sig Sauer SOR43021 Romeo4S Red Dot, Black
44 Reviews
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

In short:

You get what you pay for. The bigger your budget, the more you get in the Romeo series.

Sig Sauer Romeo 4 vs Romeo 5 Review
Via: Tactical Toolbox

After all, Sig is a well-known and trusted manufacturer. Both optics are made out of aluminum, mount easily with picatinny rails, and offer 10 illumination settings.

Regardless of which you choose, you will still have a sturdy optic.    

That said, I’d like to hear from you:

Which red dot optic will you choose? A Sig Sauer Romeo 4? Or a Romeo 5? Either way, let me know in the comments section down below.

Also, if you’re looking for a budget-friendly riflescope that is capable of shooting short-to-long range distances, check out my Vortex Crossfire vs. Diamondback review.

5 thoughts on “Sig Sauer Romeo 4 vs. Romeo 5 Review (2020)”

  1. I really like the Romeo5 on my AK-47. I just purchased a Sig Rattler and wondered if I should invest the $400 for a Romeo4 or $150 for another Romeo5.

    Reply
    • Hey Walt, the Romeo5 is a proven pick. It’s reliable, clear, rugged and most importantly…affordable. And you said it yourself: You have a Romeo5 on your AK-47 and love it.

      So it’s definitely a great choice if you’re on a budget.

      However, if you’re comfortable spending $400 on an optic, then go for the Romeo 4. It’s lightweight, compact, has stunning clarity and super easy to sight in.

      Hope this helps!

      Reply
  2. Could you cover which version of each of the Romeo4 or Romeo5’s is better, as there are several versions of each.

    Thanks for your reviews. I found them to be informative and helpful. I went with the basic Romeo5, but looking for future too.

    Reply
  3. I’m currently looking at the Romeo 5 TDR. I like the AAA battery convince, as well as the 65 moa ring for reaching out and touching someone(thing) 😎👍

    Reply

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