Trijicon SRO VS Holosun 507 Comp

Dive into our comprehensive comparison guide between the Trijicon SRO and the Holosun 507 Comp, and see why the Holosun 507 Comp might be the superior choice for those venturing into large window competition-style optics for the first time.

With the 507 comp sitting right around $370, the optic stands out as a value-packed alternative to the higher-priced Trijicon SRO, which typically retails for around $600 or more. 

Let's check them out

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Trijicon SRO VS Holosun 507 Comp - Window Size

The Holosun 507 Comp impresses with its sturdy build and a square-shaped viewing window that rivals the overall size of the Trijicon SRO's circular window. When it comes to target acquisition, the SRO's slightly taller top portion offers additional space for tracking the dot through recoil.

trijicon sro vs holosun 507 comp

Despite its compact window, the Holosun 507 Comp does not compromise on visibility. While moving and shooting at the range, I consistently kept the dot in sight. On the few occasions I lost it, likely due to less-than-perfect footwork or trigger technique, I found it much easier to reacquire than with other optics I've experienced.

Lens Frame Design Differences

While both SRO and 507 Comp use the RMR footprint, A significant advantage of the 507 Comp is the absence of the overhang found on the Trijicon SRO, eliminating concerns about shell ejection jams with most handguns.

trijicon sro vs holosun 507 competition body

Upon examination, it seems that Holosun achieved this by implementing the same side-loading battery tray design that accommodates a CR1632 battery. This design choice minimizes space usage compared to the Trijicon SRO, ensuring that there's no need for any forward-leaning components.

Also the Trijicon SRO prevents any use of forward mounted iron sights on some custom gun slides.


The Holosun 507 Comp weighs about 1.7 oz. While the Trijicon SRO only weighs 1.6 oz, they are both very light weight, and the difference isn't noticeable at all.

Battery Access

Holosun has maintained consistency in the battery tray design across various models, successfully integrating it into the 507 Comp without significant alterations to the specifications.

holosun 507 comp battery access

 Just be cautious with the tiny screw when taking out the tray because it can easily get lost or fall under the table.

On the other hand, the Trijicon has the top-loading battery compartment. 

Battery Performance

The Trijicon SRO can last about 4 to 5 years with just one CR2032 battery. If the reticle isn't in the lockout mode, the dot brightness will actually dim down to save more battery.

The Holosun on the other hand features the ShakeAwake system that turns off the optic to save more battery.

In my opinion, Both of them offer great technologies to extend the battery life even further than necessary, and I change my battery every year anyway, so these features may not be the most important to me.

Reticle Options

The Trijicon SRO actually have very simple dot selections among 1 MOA, 2.5 MOA and 5 MOA options. All of them are single dot choices that many experienced shooters love. 5 MOA in particular is the most common for competition and pistol shooters.

1 MOA is preferred for rifle use. 

However, the kicker is that all three models are sold separately, so if you want all three, that's about $1650.

holosun 507 comp reticle

The Holosun 507 Comp on the other hand offers a Competition Reticle System (CRS) that has 7 different reticle options. 

  • 2 MOA 
  • 8 MOA ring 
  • 20 MOA ring
  • 32 MOA ring

The optic is designed for competition use, and the ring reticle offers the shooter various needs.

One thing that I have noticed is that the open circle reticle actually works fairly well for shooters with astigmatism where the shooter can almost see through the ring and have better target visibility especially with the 20 MOA circle.

holosun 507 competition reticles

The 8 MOA ring with the center 2 MOA appears like a 8 MOA circle if the brightness is set just right. 

For shooters who like to shoot fast and reacquire the reticle quickly. The ring reticle can provide some view extension if the center dot moves out of the window. In my personally experience, the ACSS vulcan does this the best with its 250 MOA outer ring instead of using the 32 MOA ring.

If my assumption was correct, using anything bigger than the 32 MOA ring like a 65 MOA can help retain the reticle outer edge inside the sight window during recoil. 

Reticle Color Options

Trijicon SRO has only red reticles to buy. The Holosun 507 comp has both red and green options.

Some users prefer green. But it's all personal preference and it really doesn't make that much a difference if you have astigmatism. The green will look blurry the same as the red.

Final Verdict

If you are looking for an affordable large window competition optic that has some of the modern technologies like the multiple reticle system and ShakeAwake system, the Holosun 507 Comp offers something most shooters who are interested a great deal.

Trijicon SRO is great, but for the price point of $560 to even $600. It can be hard on many potential buyers. Both optics are very tough and reliable for range use.  

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