SIG Romeo 5 vs Romeo 4 – 2022 Comparison Guide

Whether you choose a SIG Sauer Romeo 4 or a SIG Sauer Romeo 5 as the sight for your weapon, the latter being a less expensive and smaller option, you won’t be disappointed. 

Both have been manufactured with precision, considering MOA (minutes of angle), and both feature MOTAC (motion-activated illumination).

So, if you’re having trouble choosing between the two, the guide that follows should lead you down the correct path.

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TL;DR: Romeo 4 vs. Romeo 5

Romeo 4

Romeo 5



  • Fixed lens caps

  • Four reticle options

  • Solar-powered

  • 100,000+ hours battery life

  • Four different models

  • Adjustable Sight (0.5 MOA/click)

  • Waterproof

  • Fog-proof

  • MOTAC Equipped
  • One fixed 2 MOA red dot

  • Unlimited eye relief

  • Lighter than Romeo 4

  • Waterproof

  • Fog-proof

  • MOTAC Equipped



More expensive

Less (still good) battery life

Best For

Best For

Target shooting

Home protection

Relevant Specs: Romeo 4 vs. Romeo 5


Romeo 4

Romeo 5

Dimensions: LxWxH (Inches):

3.33 x 1.86 x 2.46

 2.5 x 1.5 x 1.5




Battery Type:



Brightness Settings/Colors:

10: (8 day 2 N/V)

10: (8 day 2 N/V)

Reticle Option(s):



                                                              Dot with Holds

                                                              Circle-Dot with Holds

2 MOA Red Dot

Windage/Elevation Adjustment Resolution

0.5 MOA/Click

0.5 MOA/Click

Windage/Elevation Adjustment Range

+/- 60 MOA

+/- 60 MOA

Included Accessories:

Flip Back Lens Covers
Low Profile Torx Mount

1.41" QD or Torx Mount

CR2032 Battery

Lens Cloth

Torx Tool

Thread-In Kill Flash (4T only)

Low Profile Mount

Riser Mount

Allen Wrench

CR2032 Battery

Auto On/Off?







Romeo 5, being a little brother to Romeo 4, is smaller and more compact. Ideal for the close combat situations where speed is needed. 


Again, the lighter version of big brother, Romeo 5 would be more useful in a situation where quick-fire is required. Also, less weight to carry.

Battery Type

An important spec to bear in mind is the longevity of your scope battery. Romeo 4 is the clear winner here with twice the lifespan of its counterpart. But, the latter still has 50,000 hours, nothing to sneeze at!

Brightness Settings/Colors

These vary depending on conditions/time of day. Each has 8 day and 2-night settings, plus the same colors, so there’s nothing that sets them apart. 

Reticle Option(s)

The four different reticle options that come with Romeo 4 is the spec that puts it ahead of a smaller brother when it comes to favored choices in long distance shooting. The 2 MOA Red Dot is still nothing to be laughed at.

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Windage/Elevation Adjustment Resolution

Refers to how far to the left/right you need to aim from your target taking wind speed and direction into account. Romeo 4 is adjustable so would be preferred over longer distances. 

Windage/Elevation Adjustment Range

This refers to how far above your target you’ll need to aim taking distance into account. Once again, the adjustable option will be preferred.  

Included Accessories

Speaks for itself. The more expensive Romeo 4 comes with more accessories.

Auto On/Off

Both feature MOTAC™. Should the weapon be dead still for 10 minutes or more, this will kick in, thus saving on useful battery life.


Each scope is waterproof up to a manageable depth and is fog-proof, adding to their durability, reliability, and ruggedness.

Key Differences Between Romeo 4 and Romeo 5 

The critical differences between Romeo 4 and Romeo 5 are price, practical uses (i.e., hunting, long-range target shooting, etc.), and versatility at different ranges. 

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Advantages of Romeo 4 

  • 0.5 MOA/click
  • More versatility at different ranges
  • Better for long-range shooting
  • Good for hunting
  • Four different reticle options
  • Solar-powered with battery back-up
  • 100,000+ hours battery life
  • Four other models to choose from
  • Fixed lens caps (see-through depending on model)

Advantages of Romeo 5 

  • Lower cost
  • One fixed 2 MOA dot
  • Great for shooting within 100 yards
  • Smaller optic for unlimited eye relief
  • 40,000+ hours battery life
  • Lighter than Romeo 4

Use Case Comparison: Romeo 4 Vs. Romeo 5

Both Romeo 4 and Romeo 5 are black/non-reflective, rugged, lightweight aluminum, waterproof/fog-proof, MOTAC (motion-activated illumination) equipped, and have ten brightness settings (eight-day and two night). They allow for use in rougher environments, be it heavy rain, snow, hot, or cold, and are easy to attach to your weapon using Picatinny rails. Ideal for defending your home, target shooting, and competitions. Below we will discuss these uses: 

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Home Defense 

Effectively defending your home requires a gun sight that’s small, compact, light, and durable. It also needs to conserve battery power when not in use, so both SIG Sauer Romeo 4 and Romeo 5 have MOTAC, which is a good money saver in the long run. The 2 MOA red dot and lighter weight of the Romeo 5 model makes it easier to aim at your target from close range because the bead will cover two inches of your target at 100 yards.

Target Shooting 

SIG Sauer Romeo 4 and 5 sights are both ideal for target shooting. Whether in use on a long-distance shooting range or in a smaller shooting gallery, you’ll find either of the scopes to be useful companions to your firearm.

The red dot sight is adjustable, so when correctly zeroed to your gun and you have used all the necessities of marksmanship, all of your shots will hit where you place the red dot.


Shooting competitions involve handguns, shotguns, and rifles. Having a red dot sight attached to your weapon of choice will make the pastime that much easier. It seems that long-distance competitions are more popular, so your sights' quality is essential for your success.

Final Thoughts: Romeo 4 Vs. Romeo 5

Bearing the above traits in mind and considering the relevant specs, we will determine a winner for each;

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  • Home Defense - Romeo 4 / Romeo 5
  • Target Shooting - Romeo 4 /Romeo 5
  • Competitions - Romeo 4 / Romeo 5

So, if you spend most of your time at home and only keep your firearm for self-defense, the Romeo 5 will be the more popular and cheaper attachment. Should your weapon be used for other activities such as target shooting or competitions, the Romeo 4 is the better option. You might also find yourself in the fortunate position of owning both, in which case you’ll be able to use either, depending on your activity at the time.

People Also Ask

After extensively researching gun scopes, we have found the following four questions to be the most frequently asked; The most prominent bone of contention seems to have been where they originate from and which country makes them. The answers provided will hopefully bring more clarity to the reader.

Does Holosun Make SIG Sauer Romeo?

The same Chinese factory makes scope parts for both SIG Sauer Romeo and Holosun under two different mandates. Assembly of the products takes place in the USA by the mentioned brands separately. The design of the sights and instruction by the two entities happens in the USA.

Is the Romeo 5 Parallax Free? 

The answer to this is yes. The points of aim, as well as impact, remain the same. Users can see the aiming point and the target regardless of eye position behind the sight, providing them with unlimited eye relief.

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Where Are SIG Sauer Scopes Made?

SIG Sauer shut down operations in Germany in the middle of 2020 as their government made it more challenging to conduct business. Though still owned by Germans, the company has expanded its operations to the USA and continues operations in 88 countries. So while these scopes are designed and assembled in Oregon, USA, the actual parts (lenses, etc.) are made in China.

What Batteries Does the Romeo 4 Take? 

The Romeo 4 takes one CR2032 battery. This readily available item is side loading for quick replacement. The run time is 100,000+ hours and, with the added feature of MOTAC (motion-activated illumination), your battery will last longer when the sight isn’t in use.


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