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Holosun 507 Comp Review - The Best Competition Pistol Red Dot

Holosun 507 Comp Review - The Best Competition Pistol Red Dot

Hey Freedom Gorillas, today we are going to talk about the Holosun 507 Comp. This is one of Holosun’s newest and first “competition” style optic which has a very large window and multiple reticle options using their “CRS” complete reticle system.

We understand that not having these optics in front of it can make it difficult to decide which to get. With this review article we aim to give you more information to help you make the right decision for your use case.

The red dot version is $369.99 and green dot version is $399.99.

Holosun 507 Comp side by side - red dot sight and green dot sight

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The Holosun 507 Comp is a very large windowed optic with its primary purpose being for competition shooting. Its window is significantly larger than others on the market including the Trijicon SRO. It also has a new reticle system called the CRS (complete reticle system) which features a 2 MOA Dot, an 8 MOA circle, 20 MOA Circle, and a 32 MOA Circle. You can use just the 2 MOA Dot, or just one of the circles, or both the dot and circle together giving you many options. The 507 Comp has shake awake, is IP67 waterproof, made out of 7075 T6 Aluminum, has a side removable battery tray and comes in red or green reticles.

Holosun 507 Comp vs competitors, window size comparison

Holosun 507 Comp Side by Side Boxes

Buy the 507 Comp Red Dot at The Best Price Buy the 507 Comp Green Dot at The Best Price

Other quick stats and dimensions on the Holosun 507 Comp are as follows:

  • Open Reflex Sight (Read more about open vs closed emitters optics here)
  • RMR Footprint
  • CRS Reticle (7 Reticles in 1) 32, 20, 8 MOA Circles + 2 MOA Dot
  • 10-50K hrs of battery life on setting 6 depending on reticle
  • 10 Brightness Setting: 8 Daylight & 2 Nightvision Compatible
  • Manual Brightness Only
  • Convenient Side Battery Compartment
  • 7075 T6 Aluminum Housing
  • Parallax-free & Unlimited Eye Relief
  • IP67 Waterproof
  • Shake Awake™
  • Multilayer Reflective Glass
  • 1 MOA Adjustment per Click
  • CR1632 Battery
  • Window Size: .87" High, .1.1" Wide
  • Optic Size: 1.77"L, 1.25"H, 1.3"W
  • Weight: 1.5 oz

Holosun 507 Comp Reticles

The Holosun 507 Comp comes in red or green reticle versions and comes with the CRS reticle which 7 different reticles in one. The 2 MOA Dot, or just one of the circles, or both the dot and circle together.

The reticle can be toggled by holding down the "-" button for 3 seconds.

Holosun 507 Comp Complete Reticle System Example

The green version is slightly more expensive.

Holosun 507 Comp Reticle side by side, red vs green

Holosun 507 Comp Pricing & Models

The Holosun 507 Comp comes in red or green reticles and has the Complete Reticle System (CRS).

You can learn more about red vs green dots here.


Holosun 507 Comp Red Dot Sight


Buy the 507 Comp Red Dot At The Best Price


Holosun 507 Comp Green Dot Sight


Buy the 507 Comp Green Dot At The Best Price

Holosun 507 Comp Dimensions & Size

Holosun 507 Comp Dimensions, Size, Weight
  • Deck height: 9MM
  • Width: 1.3"
  • Length: 1.77"
  • Height: 1.25"
  • Window Size: 1.1" Wide, .87" Tall
  • Weight: 1.7 oz

Holosun 507 Comp Footprint

The Holosun 507 Comp is an RMR footprint optic. This means it will fit on any RMR footprint slide or adapter plate.

Holosun 507 Comp RMR Footprint + RMR Slide example

Holosun 507 Comp Intended Use

The Holosun 507 Comp is an RMR footprint optic and a regular sized pistol red dot. This means it is intended for use on any pistol with an RMR footprint or RMR adapter plate. Most of the time this means the pistol will be a full size or compact such as a Glock 19 MOS or a S&W M&P 2.0. Make sure you know what footprint your gun is. The 507 Comp is not intended for and usually will not fit any micro compact pistol like a Glock 43X MOS or Sig P365. For the smaller pistols you want to look at the 507K X2 this is because the smaller micro compact pistols usually come with a different footprint like the RMSc or K series footprint.

The 507 Comp can also be used as a rifle optic, PCC optic, or backup scope optic if you get an "RMR" picatinny or offset adapter found here.

In the Holosun 507 Comp Box

When you open the Holosun 507 Comp this is what you will find in the box:

  • 1x CR1632 Battery (installed inside the optic)
  • Holosun Warranty Card
  • Holosun Battery, Screws, & Adjustment Tool
  • Holosun Manual
  • 4x 6-32 Screws (short), 4x 6-32 Screws (long)
  • 507 Comp Optic
  • Lens Cloth

Holosun 507 Comp Screws & Batteries

Here is an up close photo of the Holosun 507 Comp Screws, Battery, and Tool that come in the box. The battery will be pre-installed in the optic.

Holosun 507 Comp Screws, Batteries, and Tool

Holosun 507 Comp Fitment Info & Adapter Plates

Below is information on mounting the Holosun 507 Comp Reflex Sight on different pistols. Some pistols require adapter plates to make it fit. The table below is for Optics Ready pistols only. If you do not have an optics ready pistol and still want to mount a 507 Comp to your platform, you can get a dovetail mount which replaces your rear dovetail sights. Find all our dovetail mounts here.

*Note: Clicking on the pistol name below will take your to our fitment guide which explains more about each platform.

Anderson Manufacturing

Arsenal Democracy

Bul Armory



Heckler & Koch


Palmetto State Armory

Shadow Systems

Smith & Wesson

Staccato 2011



Wilson Combat







Nighthawk Custom

Sig Sauer

Springfield Armory




Don't see your model listed? Check out our Fitment Guides Here.

Holosun 507 Comp Review & Highlights

The Holosun 507 Comp is one of the hottest new releases from Holosun and in the pistol red dot market and for good reason.

For years competitive shooters used either the Trijicon SRO, Delta Point Pro, or C-More optic and now the Holosun 507 Comp provides a great alternative to all them. It has a common RMR footprint, and the window size is extremely large. Another big change from other competing optics is its price point and it’s CRS Reticle which gives you 7 reticles in one. 

Holosun 507 Comp Reticle Example

The Complete Reticle System (CRS) uses a series of dots and outer rings to give you 7 reticle options. What we really like also is that the outer rings do not have “hash” marks like the standard MRS reticle, instead you get a perfect circle which we find very pleasing to look at.

Holosun 507 Comp Mounted - Co-witness - PSA Dagger, suppressor height sights

The 507 Comp comes with all the great Holosun features like shake awake, red or green reticles, 7075 T6 Aluminum housing, IP67 waterproof rating, side removable battery, and great battery life.

It has manual brightness only and doesn’t have a solar failsafe.

The 507 Comp is a great choice if you are looking for an optic with a very large window. From our first hand experience, having a large window helps you “find the dot” easier since it’s less likely to jump completely off the screen when shooting. This makes for quicker follow up shots.

Holosun 507 Comp Red Dot Sight


Buy the 507 Comp Red Dot At The Best Price

Holosun 507 Comp Green Dot Sight


Buy the 507 Comp Green Dot At The Best Price

Holosun 507 Comp Downsides

The only real downsides of the 507 Comp are that it is a little pricey compared to other Holosun options, it doesn’t have a solar failsafe or auto brightness, and it is large.

People do use it for EDC however it is pretty big so if you are looking for something sleek, perhaps checkout the 507C X2 instead.

Holosun 507 Comp Warranty

Holosun has a limited lifetime warranty. Basically everything is covered for the lifetime of the optic except for the electronics, that is covered for 10 years.

We’ve dealt with Holosun’s warranty department and they are easy to deal with.

Also when you purchase from Freedom Gorilla, if you have an issue within 30 days we will replace the optic for you free of charge.


If you are a competitive shooter and looking for the best “competition” optic, then the Holosun 507 Comp is hard to beat. It has the largest window, is the most competitively priced, and gives you the most reticle options. Put simply, it’s the best bang for your buck.

The 507 Comp is not intended for duty or EDC however there are people who run them.

If you really need a larger window pistol optic, this is the largest you will find on the market, with the best track record of performance and reliability.

If you have any further questions please reach out.

Thanks for reading!

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