Holosun 507 Comp Review

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Holosun 507 Comp Review

The Holosun 507 Comp is a new offering by the popular red dot company and was quickly dubbed the SRO killer. Due to its large window and generous choice of reticle options, it’s now one of the most popular competition red dots on the market.

If you’re looking to break into the world of competitive shooting, you owe it to yourself to make the Holosun 507COMP a strong consideration. In fact, I purchased this red dot for that very reason.

In this article, we’ll review first impressions, features/specs, and the results from my first outing with the red dot.

I’ve been shooting for many years and have recently had the itch to start competing. I knew the Trijicon SRO was popular among competition shooters, but I’ve always had a soft spot for those reticle options. When the 507 Comp came out, it didn’t take much thought… I jumped on it.

HOLOSUN HS507COMP Red CRS 2 MOA Dot & 8/20/32 MOA Circle Reflex Pistol Sight with Large Objective...
  • Extra-large window
  • Multi-Reticle System: 2 MOA dot + 8, 20, 32 MOA circles
  • Shake Awake Technology
  • Battery life of up to 50,000 hours
  • Lock Mode, prevents inadvertently making adjustments
  • Durable 7075 T6 aluminum housing
  • IP67 Waterproof
  • 10 brightness settings - 8 daylight, 2 night-vision

  • First Impressions

    I’ve owned many Holosun red dots, but the first thing I noticed during the unboxing was the enormous window of the 507COMP. It was a beautiful thing. I knew that the window size would greatly help in finding the reticle quickly and target acquisition.

    I wanted to compare the window size to a 507C, which I use on a couple of different EDCs. The difference is clear as day, as seen in this image.

    Holosun 507Comp vs 507c
    Window comparison - 507COMP on the left and 507c on the right

    HS507COMP Features

    Here are some of the most notable features of the Holosun HS507COMP.

    Window Size

    As mentioned above, the size of the window is quite impressive. It measures 1.1″ x 0.87″, significantly larger than other Holosun pistol optics, and beats out the SRO, which measures 0.98″ x 0.89″.

    Fit and Footprint

    The 507Comp is made to fit the Trijicon RMR footprint, so any slide or adapter plate with this footprint will work. Mounted on a Glock 34 with a double-stack slide width, there is a little overhang on the sides, but this is okay with me. This red dot is not meant for single-stack, slimline, or micro concealed carry guns.

    The box contains two sets of mounting screws, (4) shorter screws and (4) longer screws. For my Glock 34 and MOS mounting plate, I used two of the shorter screws.

    Reticle Options

    Holosun continues to lead the way with its MRS (multi-reticle system). What sets the 507 Comp apart is the addition of different circle sizes. Now, in addition to the 32 MOA circle, you can choose 8 MOA and 20 MOA circles and any combination with the 2 MOA dot. Here’s a breakdown of the eight different reticle options.

    • 2 MOA dot only
    • 8 MOA circle only
    • 20 MOA circle only
    • 32 MOA circle only
    • 2 MOA dot and 8 MOA circle
    • 2 MOA dot and 20 MOA circle
    • 2 MOA dot and 32 MOA circle
    • 2 MOA dot, 8 MOA circle, and 32 MOA circle
    Holosun 507 Comp - Reticle Options
    Visual representation of the (8) reticle options on the Holosun 507COMP

    While having different options is great, I’ll most likely stick to my all-time favorite: the 2 MOA dot and 32 MOA circle. This reticle always works best for me, as I can wrap the circle around the target and 2 MOA dot over the bullseye. However, if shooting at further distances, I see the potential of using the 2 MOA dot and 20 MOA circle. Those who prefer a larger dot will like the 2 MOA dot and 8 MOA circle, as this basically gives you an 8 MOA dot.

    In addition to the MRS (multi-reticle system), Holosun offers this optic in a green reticle, the HE507Comp. Many shooters find a green reticle to be easier on the eyes. I completely understand that, but I wanted to stick with red. Shooting competitions are often outdoors, and I didn’t want my dot getting mixed up with any surrounding foliage.

    HOLOSUN HS507COMP Red CRS 2 MOA Dot & 8/20/32 MOA Circle Reflex Pistol Sight with Large Objective...
  • Extra-large window
  • Multi-Reticle System: 2 MOA dot + 8, 20, 32 MOA circles
  • Shake Awake Technology
  • Battery life of up to 50,000 hours
  • Lock Mode, prevents inadvertently making adjustments
  • Durable 7075 T6 aluminum housing
  • IP67 Waterproof
  • 10 brightness settings - 8 daylight, 2 night-vision

  • Glass

    The lens glass of the 507 COMP is crystal clear, giving you the perfect balance of reticle and target clarity. This has been my experience with all Holosun optics; the HS507COMP is no exception.

    Shake Awake Technology

    Many Holosun red dots on the market offer Shake Awake Technology. This feature is important for two reasons. One, it helps to maintain battery life by automatically shutting off after a period of motionless storage. And two, it makes your optic instantly turn on when motion is detected.

    I’ve tested this with various applications, and it works very well. For instance, for my range or competition guns that are stored in a safe, the optic shuts down and turns back on without issue. For my carry guns, the red dot never powers off as I’m constantly moving around.

    Brightness Settings

    There are (10) total brightness settings available on the 507 COMP. Two settings are meant for very low-light situations, and eight are for bright/daylight conditions. Brightness levels are easily changed by quick-pressing either the “+” or “-” buttons.

    Lockout Mode

    The Lockout feature protects your brightness or reticle settings from inadvertently changing them. While this may be helpful in some situations where lighting conditions remain constant, I rarely use it as I’ve often needed to adjust brightness when lighting conditions change.

    Durability / Water-Resistance

    The Holosun 507COMP is constructed of durable 7075 T6 aluminum with an anodized finish. It is waterproof with a submersion rating of IP67. While I have never personally tested the water resistance by submerging my red dots in water, I know others have without issue. My Holosun optics have seen their fair share of rainwater over the years and have yet to have any water intrusion problems.

    Field Testing

    To test my new red dot out, I chose to give it a go at my first steel match. This would allow me to really get a feel for how the 507 Comp performs while doing quick draws and fast target-to-target shots. While I practiced some dry-fire drills beforehand, the Holosun 507 Comp was new to me, and I knew that target acquisition might take some getting used to. Unfortunately, I didn’t have time to take it to the range before my first match, so I had to go solely off a boresight, which I used to zero at 10 yards.

    Match Setup

    I was pleasantly surprised to find just two other competitors at the steel match. A smaller group helped ease my nerves. We ended up rotating in and out, with two shooters competing at a time. The setup was a rack of six round steel plates at each station, set 10 yards from the shooter.

    Steel Match Setup
    My shooting station overlooking the rack of six steel plates

    My Competition Setup

    My competition pistol is a Glock 34 with no irons. I removed the iron sights to eliminate any chance of them getting in the way of my red dot. I know some people find irons helpful in finding the red dot quickly, but in all of my shooting, I’ve focused solely on the red dot and not relied on a co-witness with irons. If I get serious about competitive shooting, I’ll bring a backup gun in the event my red dot fails.

    Initially, I had a Holosun 507c mounted to my G34, but when the 507 COMP was released, I was excited to swap optics for the larger window and reticle options.

    Glock 34 with Holosun 507 Comp
    Holosun 507 Comp mounted on a Glock 34 - Left side view
    Glock 34 with Holosun-HS507Comp
    Right side view
    Glock 34 with Holosun 507 Comp - Rear View
    Rear view

    My Performance and Match Results

    My goal for the first match was to take my time and hit targets. I knew that I wouldn’t be the fastest shooter, but I also knew that speed played an important factor.

    I was surprised at how easy it was to pick up the red dot with that extra-large window. It took little to no getting used to. It could be prior training with red dots that helped, but I was able to bring the optic up to my line of sight and find the red dot immediately.

    My first couple of sets were so-so, but I hit all six targets with just one mag (loaded to 10 rounds) and did not have to do any re-loads. I suppose that’s good, at least.

    One of the competitors claimed to have been doing these matches for several years, and it was apparent. He whooped my butt. This competitor was using a CZ hammer-fired pistol (missed the model) and was shooting with irons only. Because I was using a red dot and he was not, the rules stated that he would start each round with a free shot, which he nailed every time.

    As I made it past my first couple of sets, I became more comfortable, not only with the 507COMP but with the match in general. My targets hit to rounds shot ratio started improving, and I felt pretty good. I finished the match in 2nd place, beating out the 3rd competitor, who also used a red dot.

    My First Steel Match Performance
    Finishing the round with one steel plate left on the competitor's rack. I did it!

    I considered this first match a great introduction to the world of competitive shooting. Lessons were learned, and I feel more confident going into my next one. Eventually, I plan to compete in IDPA matches, but I wanted to start small and work my way up. I felt this would help me learn how to shoot quickly and accurately without the added stress of running around from station to station.

    HOLOSUN HS507COMP Red CRS 2 MOA Dot & 8/20/32 MOA Circle Reflex Pistol Sight with Large Objective...
  • Extra-large window
  • Multi-Reticle System: 2 MOA dot + 8, 20, 32 MOA circles
  • Shake Awake Technology
  • Battery life of up to 50,000 hours
  • Lock Mode, prevents inadvertently making adjustments
  • Durable 7075 T6 aluminum housing
  • IP67 Waterproof
  • 10 brightness settings - 8 daylight, 2 night-vision

  • Conclusion

    Overall, the Holosun HS507COMP should be a top contender when it comes to competition red dots. While the Trijicon SRO has held the #1 spot until now, the 507 Comp offers features that set it apart and should be considered by all competitive shooters.

    From the multiple reticle system to the bigger window, the 507Comp is undoubtedly a solid option.

    I hope that you found this article helpful and informative. Please comment below if you have any questions or experiences with the HS507COMP. We’d love to hear from you!

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