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  • Post last modified:March 29, 2024
holosun 507 comp review

After being on the fence for about 1 year since the release of the Holosun 507 Comp. I have decided to buy one to test it out for myself alongside the Trijicon SRO. So in this Holosun 507 Comp review guide. Let's check out what makes it special including pros and cons.

Holosun 507 Competition Overall Quality

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  • Large viewing window for target acquisition
  • More affordable than Trijicon SRO
  • Lasts 50k hours
  • No lens overhang
  • No glare, No lens edge distortion


  • Too many reticle options while just a big dot is preferred over circle reticles.

Recommended For Handgun & Rifle

Large Field Of View

For Lightweight Setup

holosun 507 comp vs sro

Why Trust Me

I've purchased most products using our own money, therefore the review is unbiased and there isn't any time constraint or outside influence on how I test them. After 15 years of real steel shooting experience I have seen what works, what doesn't and what's complete waste of money. 

holosun eps testing

So far I have used most of Holosun products in rainy and snowy conditions including the latest EPS red dot sight, and all of them have I have a few things to say about them with unique images and videos.

Holosun 507 Comp Specs & Performance

The Holosun 507 Comp in my experience is a direct competitor to the Trijicon SRO and the DeltaPoint Pro. Here are its specs referenced from Holosun's website.

  • Window size: 1.1" X 0.87"
  • Reticle: 2 MOA Dot, 8, 20 and 32 MOA Ring
  • MOA turret: 1 MOA per click
  • Dot color: Red or Green (Sold separately)
  • Material: 7075 T6 aluminum 
  • Submersion: IPX67
  • Battery life: 50000 hours (CR1632 battery)
  • Mounting footprint: RMR
  • Dimensions: 1.8" X 1.3" X 1.3"
  • Weight: 1.7 oz

Field Of View

The Holosun 507 Comp feels very sturdy and solid right out of the box. One thing that stands out the most about it is the large viewing window to track the dot easier. It's definitely bigger than the Leupold DeltaPoint Pro and it felt similar to the Trijicon SRO, and the dot will always stay in the window for faster reacquisition during recoil.

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The viewing window profile a square. Just picking it up for the first time you will not have any impression that this is a small optic.

It makes the sight picture appear much bigger and wider especially when aiming with two eyes open. The user can see much more of the surrounding areas.

holosun 507 comp field of view

Another huge thing to point out is that the 507 comp doesn't have the overhang that the Trijicon SRO has.

So shell ejection jam will not be an issue for most handguns.

holosun 507 comp no overhang
trijicon sro ejection port jam


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.

holosun 507 comp view


After zeroing the dot for pistol use at 10 yards. The optic functioned just like other Holosun products. 

The turret value is 1.5 MOA per click, which is a bit too much for just one click. This means making finer 1 MOA adjustment is not going to be easy.

If you choose to mount this on a rifle as an offset optic, this may not give you refined zeroing.

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Using the 507COMP is straightforward if you have solid shooting fundamentals. I've tested it on various handguns including the FN 509 LS Edge, Walther PDP, Glock, and Springfield Echelon.

The dot remains consistently in view, even during rapid follow-up shots across these models. This ease of use makes the optic suitable for beginners to quickly adapt to, while experienced shooters will appreciate the larger viewing window, likely preferring it over optics with smaller fields of view.

Parallax Shift

The parallax shift is definitely noticeable at closer distances let's say 3 yards. But at 10 to 25 yards, there is no noticeable parallax shift.

Battery Tray

holosun 507 comp battery tray

The 507 Comp features the same side loading battery design as other Holosun pistol optics. The small screw can easily get lost or fell under the table, so be sure to keep an eye on it when taking it off to change the battery.

Speaking of the battery. It uses a CR1632 battery and it can lasts about 50,000 hours. So far the optic has only been used for about 1 year, and I will see if it can last for another 3 or 4 years without a battery swap.


holosun 507 competition reticles

What makes the 507 comp special is its competition reticle system (CRS). 

It has:

  • 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.

After testing it personally on the range and at home. I think for shooters with astigmatism, the 32 MOA ring has the best clarity without the center dot.

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While I wish Holosun just release a 6 MOA model since most competition shooters prefer a big dot. The 8 MOA ring with the center dot actually mimic the feel of a 8 MOA dot, but not quite.

So out of all the reticle options, I actually like the 8 MOA ring with the 2 MOA center dot the most.

Reticle Brightness

The Holosun 507 comp offers 10 day light settings and 2 night vision settings. The buttons are easy to adjust.

Hold the "+" button to lock the setting, and hold the "-" button to change reticles. It's has no learn curve for existing Holosun users.

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On a bright sunny day, cranking up the brightness doesn't really matter, because the sunlight can wash out the glare.

So far I have only tested this under day light, and I can confidently say that it's bright enough just like other Holosun optics I have tested on this site.

holosun 507 competition review

When pointing the optic directly towards the sun, there isn't any glare visible. For example, at my outdoor range the sunset direction always forces me to look into the sun while aiming. The dot is bright enough but I can barely see the target even if I wear my sunglasses.

No one feels comfortable looking into the sun, and most optics I have used don't do well in direct sunlight. So I'm not going to be nitpicky about it.

Final Verdict 

The Holosun 507 Competition model is Holosun's first product to go compete with the Trijicon SRO and the DeltaPoint Pro. The large sight window is the biggest feature of this optic while keeping the optic very simple to operate.

The optic basically follows the same design as many other Holosun products, and one thing that stands out for me the most is that it doesn't have the overhang like the SRO, which can cause shell ejection problem if mounted too far forward over a pistol ejection port. 

While the competition reticle system (CRS) offers unique aiming experiences, I kinda wish a simple 6 MOA was made just like the Holosun EPS.

Overall, the Holosun 507 comp is a great optic for the price point just under $370 for the red reticle. While the Trijicon SRO costs almost $600, the 507 comp is still way more affordable for anyone looking for a competition style optic.