Holosun 507Comp Red Dot Review: Best Competition Pistol Optic?

When it comes to competition and range use, it is widely accepted that a bigger optic makes it easier to see your target and acquire your reticle.

Holosun entered the large-window pistol dot market a few years ago, aiming to offer an affordable option for competitive shooters and people who simply want to squeeze more performance out of their range or home defense guns.

Did they succeed in doing so? We ran this optic for a little over a year on multiple guns to see if we could answer that question. Hop aboard as we go over the good and the not-so-great.

Holosun 507Comp

$369

at MidwayUSA

Prices accurate at time of writing

$369 at MidwayUSA

OpticsPlanet (see price)

Brownells (see price)

Kygunco (see price)

Show all prices

Holosun 507Comp Specs & Features

Specs

• Weight: 1.7 oz
• Illumination Settings: 8 daylight, 4 night vision
• Reticle: Performance Reticle System (PRS)
• Dot Size: Selectable 2 MOA dot with 8 MOA, 20 MOA, and 32 MOA circle options
• Reticle Color: Available in Red, Green, Gold
• Window Size: 1.1” x 0.87”
• Footprint: Trijicon RMR
• Waterproof Rating: IP67
• Battery: CR1632
• Battery Life: 50,000 (setting 6)
• Country of Origin: China
• Comes With: Optic, mounting screws (two lengths), lens cloth, multi-tool, manual, warranty card

Features

• Shake-awake auto on/off technology
• Side-mounted battery tray
• Manual brightness with Lock Mode
• 7075-T6 aluminum housing

How We Tested the Holosun 507Comp

I installed, zeroed, and tested the Holosun 507Comp on the following three handguns.

• Walther PDP Pro-X – 650 rounds
• Canik Rival-S – ~1000 rounds
• S&W TRR8 – 300 rounds (.38 Special), 200 rounds (.357 Magnum)

On both the Canik and Walther, the optic was mounted using the supplied adapter plates. For the S&W revolver, the optic was mounted using an aftermarket RMR-to-Picatinny adapter.

Accuracy testing was mostly conducted freehand at distances from 7 to 50 yards, with a few groups shot off a rest with the PDP Pro-X.

While no official drop testing was conducted, the optic did suffer an accidental drop, resulting in damage noted in the article.

Holosun 507Comp Backstory

While C-MORE has been making large-window competition dots since the 1990s, the first true modern RMR-pattern duty dot with a large window was the Trijicon SRO, which debuted in 2019.

The SRO quickly became the de facto high-end competition dot, with the only challenger in that space being the Leupold Delta Point Pro, which was released in 2021.

In a bid to bring a more affordable competition optic to market, Holosun introduced their large-window 507Comp in 2023.

Range Testing the Holosun 507Comp: Performance & Reliability Analysis

Holosun set out to make a dot with a big viewing window, and they definitely did.

The lens is a whopping 1.1 inches wide by 0.87 inches tall.

Size-wise, the glass is a bit taller than both the Trijicon SRO, though the difference in housings makes it hard to tell which is larger without busting out the calipers.

Not only is the window generously sized, but the body itself is fairly thin. This means you see mostly the window and not a ton of bezel. It makes for an awesome field of view.

It is definitely a step up in window size from standard-sized dots like the Holosun 407C, Trijicon RMR, and Holosun EPS.

While the glass is of good clarity, the 507Comp has a slightly more aggressive notch filter than some of the other optics I have, resulting in a slight blue tint on the glass.

Reticle

Holosun opted for an interesting reticle that they dub the Performance Reticle System, or PRS.

It consists of a 2 MOA center dot with additional 8 MOA, 20 MOA, and 32 MOA circles.

Here are the eight reticle options that you can cycle through by holding down the minus button on the side of the optic.

• 2 MOA dot only
• 2 MOA dot and 8 MOA circle
• 2 MOA dot and 20 MOA circle
• 2 MOA dot and 32 MOA circle
• 8 MOA circle only
• 20 MOA circle only
• 32 MOA circle only

The various circles are great for people who like to put plates or other targets inside the circle for quick acquisition rather than looking for a single center dot.

While I do think that the 32 MOA circle-only option makes for a good shotgun reticle, I feel like the smaller 8 MOA and 20 MOA circle-only options are a bit superfluous.

I have read various forums and talked to various people about this reticle. Some people seem to love it, while others feel like it is not the right choice.

After shooting both the Holosun 507Comp and Vortex Defender-XL extensively, I found myself preferring the 5 MOA center dot of the Vortex over the 2 MOA + rings setup on the 507Comp.

It is just a personal preference thing for me. I think the Performance Reticle System is implemented well, and as I stated, some people absolutely love it.

The reticle is also extremely crisp, which has been my experience with most Holosun optics. This really helps if you suffer from astigmatism or starbursting.

Reliability

This particular 507Comp was mounted on a Walther PDP Pro-X for the entire time I reviewed that gun. It then sat atop a Canik Rival-S for quite some time before being moved over to a S&W TRR8 .357 Magnum revolver, where it was mounted on a Picatinny adapter.

I experienced no flickering or loss of zero at all during testing on any of those firearms.

Everything was holding up swimmingly on the 507Comp until something took an unfortunate spill off a short table that was only about 2 feet tall.

The optic struck the ground at the rear right corner of the housing, resulting in the glass developing a single stress crack near the top right.

It was extremely disheartening and somewhat unexpected, as all of my other Holosun optics have held up extremely well. Everything else seemed to be in place, and the reticle remained 100% visible and functional, but the crack is evident.

Holosun offers a limited lifetime warranty that covers manufacturing defects and issues, but not physical damage. If this happened to my Vortex Defender-XL, it would be covered by their unconditional, no-fault, VIP warranty.

While this seems like an isolated incident, accidents do happen, and it is something to think about.

Ergonomics

You get two nicely sized buttons that are very easy to use. I never had an issue with them being accidentally depressed.

The buttons only really need to be used to adjust the brightness or reticle. This model does not feature an auto-adjust brightness mode, which I don’t mind since they never work well for me anyway.  

There is also an optional lockout mode that prevents accidental brightness or setting changes. This ensures nothing happens if the optic is bumped during a match or during transport.

Thanks to the amazing shake-awake system, you don’t have to fumble with any buttons to turn the optic on or off. It automatically turns on when it senses even the slightest motion and shuts off after 10 minutes of no movement to preserve battery life.

The 507Comp boasts a staggering 50,000-hour battery life on setting 6. But if you do find yourself needing to change the battery, it is easily accessible via a side-loading tray that doesn’t require removing the optic and losing your zero.

Adjustments are easy to make with the provided tool. The clicks are audible and just tactile enough to count how many you are making. Zeroing the 507Comp was pretty effortless, regardless of the gun.

Improvements We’d Like To See

I will address the elephant in the room here. I’d like to see a slight redesign of the housing to help improve the overall durability.  

Suffering a crack from a single drop is not something anyone wants to experience.

My only other complaint has actually already been addressed by Holosun. When I got my hands on this optics, the PRS was the only available reticle. Holosun now offers the cheaper 407Comp, which features a standard 6 MOA dot.

Holosun 407Comp

$279

at Midway USA

Prices accurate at time of writing

$279 at Midway USA

Brownells (see price)

OpticsPlanet (see price)

Who Is It For?

Large-window red dots are primarily marketed toward competitive shooters, people who want a nice, big optic for a range toy, and home defense usage.

Given the reticle system it comes with, it definitely trends more toward competition and range use, though I can see a use case for shotguns with the large circles as well.

By The Numbers

Clarity: 7/10

The glass is clear and mostly distortion-free, but it has a noticeable, slight blue tint when compared to similar optics.

Durability: 5/10

I had zero issues with the optic holding zero across multiple firearms, even with magnum cartridges. However, a single drop in just the wrong location resulted in a cracked lens. The optic did remain functional.

Ease of Use: 9/10

Installation and zeroing were a breeze. The buttons are easy to press, and the reticles are easy to cycle through. Shake-awake technology lets me avoid worrying about turning the optic on and off.

Shooting Performance: 9/10

I was able to rip out the X-ring of a B-27 target at 25 yards freehand with three different guns using this optic. The 2 MOA dot is great for precision shooting, and the circle reticles are great for quick target acquisition. I would have preferred a 4-6 MOA reticle for competition purposes.

Value: 7/10

Holosun initially had the most affordable large-window pistol dot, but other options like the Vortex Defender-XL and Swampfox Justice II are now available for less money. The 507Comp still packs in a ton of features at a very reasonable price.

Overall: 7/10

Holosun 507Comp

$369

at MidwayUSA

Prices accurate at time of writing

$369 at MidwayUSA

OpticsPlanet (see price)

Brownells (see price)

Kygunco (see price)

Show all prices

Final Verdict on the Holosun 507Comp

My experience with the 507Comp was extremely positive right up until it fell off a table and cracked the lens. I am not sure if I was unlucky here or if this is more common with a lens this large.

While the reticle isn’t quite my speed, I definitely see the appeal. The glass is nice and clear, the reticle is crisp, the layout and overall features are very nice, and it is priced fairly.

Overall, it is a nice performer that I only hesitate on due to potential durability concerns and personal reticle preference.

What are your thoughts on the Holosun 507Comp. Do you have any experience with this optic? Sound off in the comments below! Looking for other optic options? Check our article on the Best Pistol Red Dots!

Meet the Experts

This review was conducted and written by Pew Pew Tactical Editor & Senior Review Analyst Wyatt Sloan. Wyatt is an NRA-certified and USCCA-certified instructor, former competitive shooter, and an avid hunter.

He has previous experience as a home-based FFL and personally owns over 200 firearms — including over a dozen handguns with red dots. He uses his experience across a wide variety of platforms and optics to evaluate red dots based on Pew Pew Tactical's testing protocols and editorial standards.