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  • Post last modified:August 31, 2023

Sig Sauer ROMEO3 MAX is a new open emitter reflex sight on the market with a large field of view, and we are comparing this with the new Trijicon SRO head to head.

Sig Sauer ROMEO3 MAX vs Trijicon SRO…Which one would you get?

I have used both optics at a local gun shop, and based on historic performance, I will go with the Trijicon SRO for long battery life and accuracy, until we get more infield data on the Sig ROMEO3 MAX.

At the end of this post, you will learn the major differences between the two optics, and what new things Sig Sauer ROMEO3 MAX brings to the table.

Read More: Detailed Review of Trijicon SRO

Sig Sauer ROMEO3 MAX vs Trijicon SRO Comparison Chart

Both optics are expensive around the north of $550, but you will get a ruggedized optic with a large field of view to keep the dot in the glass without ever losing them.

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Check Out More: Best Micro Red Dot Sights Under $400

Trijicon SRO Has Stronger External Construction

Smith Wesson M&P with Trijicon SRO

Image Referenced ShotShow

The Trijicon SRO is made with forged 7075-T6 aluminum, the toughest material in the industry weighing only 1.6 oz.

Fully ruggedized external construction, that can endure all kinds of physical rough handling. It's predecessor Trijicon RMR has an impressive reputation for its durability and performance in the last couple of years.

People love having it on handguns and other low profile rifle and PCC setups.

The ROMEO3 MAX also has a circular lens frame for enlarging the field of view and based on the engineering principle, the curved lens frame reduces concentrated stress on the frame, which makes it stronger.

Compared to the ROMEO1, the ROMEO3MAX looks like a one-piece construction without any secondary parts attached with screws.

Lens Size & Quality


Both optics have superior lens coatings that protect the sight from scratches and fog. Both optics have a little blueish tint on the glass, but not so much that could distract what you're doing.

Using them on a sunny day shouldn't be a problem.

Two of these optics have great lens size at about 1X30mm. Red dot pistols in the past always had a problem with shooters not able to find the dot faster, a large window gives the shooter more room to work with.

Dot Sizes

SIG ROMEO3 Comparison

The ROMEO3 MAX offers 3 MOA and 6 MOA dot sizes for rapid target engagement.

Trijicon SRO offers 1 MOA, 2.5 MOA, and 5 MOA.

5 and 6 MOA dot sizes are favorable in competitive shooting,  2-3 MOA are great for target shooting, and 1 MOA is optimized for accuracy at distance.

Brightness Settings

Sig ROMEO3 MAX has 12 illumination intensity levels that let you adjust the reticle both indoor and outdoor regardless of the lighting condition.

The Trijicon SRO only has 6 visible LED & 2-night vision settings.

Both sights are built to be ready in any condition.

Large Field of View Is Always Better

SRO Dot Size

Large field of view is what the ROMEO3 MAX is going for. This sight is developed by the Team SIG Captain, Max Michel.

In optic pistol shooting, the most important thing is mastering the fundamentals first, and the next is to track the dot inside the lens consistently.

In the past, shooters always complained about the difficulty they have to overcome for tracking the red dot inside a small window, and some people adjust and tweak how they present the gun in order to pick up the red dot sight fast over and over again.

This problem gives the shooter the chance to be more precise and proficient in training to get consistent results but having a large field of view makes things easier.

Practical Applications

USPSA Shooting

The Trijicon SRO and Sig ROMEO3 MAX are made for the handgun for easier dot tracking, they're great for USPSA competitions.

They're perfect low profile optics for PCC, offset angled backup sight, shotguns and on PDW carbines.

Trijicon SRO Has 1.5X More Battery life

Sig p320 with trijicon SRO

Both reflex sights use a single CR2032 battery to power the thing. The Trijicon SRO top-loading battery redesign was my favorite feature that they added compared to the RMR, which requires the user to remove the sight for battery replacement.

This saves time looking for tools and re-zeroing.

The Trijicon SRO has about 26,000 hrs using 1 CR20302 at setting 4 of 8, and the ROMEO3 MAX has just 20,000 hrs.

That's average of 2.6 years of battery life.

Even though both of them don't have 50,000 industry-standard hours, its recommended to replace the battery every year anyway.

The Trijicon SRO will always be on and will never fail as long as the installation screws are tight, and the ROMEO3 MAX has something special called the MOTAC for the battery saving.

ROMEO3 MAX Motion Activated Red Dot (MOTAC)

Sig Sauer ROMEO3 MAX Side view

Part of the battery saving perks that the ROMEO3 MAX has is the MOTAC feature. The Motion Activated Illumination System powers up the sight when it senses motion and it turns off when it does not.

This is an awesome feature for someone who is OCD about whether if they forget to turn the sight off or not. As long as you put that thing away in the closet or the gun safe, it will turn off assuming there is no physical movement.

When you need it, just grab it, and it's on. What that is doing is optimizing the battery life and make it ready when you needed it the most.

Final Verdict Sig ROMEO3 MAX vs Trijicon SRO

Sig ROMEO3 MAX vs Trijicon SRO, which one is better?

The Trijicon SRO has a longer battle-proven history than the Sig Sauer ROMEO3 MAX. I have used two of these sights at the local range, and I gravitate towards the Trijicon because of its quality and reputation.

The ROMEO3 MAX's large field of view is an amazing upgrade from the ROMEO3 and ROMEO1, and it's Sig Sauer's first product competing with the Trijicon SRO.

Trijicon is made with industry toughest aerospace material 7075-T6 forged aluminum with top loading battery, each battery last about 3 years.

The ROMEO3 MAX needs more time in the field for more testing before we can give it a good thumbs up.