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Questions & Answers
Will this fix my Glock model 45? Will it require a gunsmith or does it attach to the rear site mount? Expert Answer

If you have the Glock 45 MOS (optic ready), you will use the #2 adapter plate included with your Glock to mount this optic. If you do not have an MOS model Glock 45, you must use a dovetail adapter plate or have your slide milled for an RMR pattern optic. The adapter plate that will allow you to install this optic can be found by using the link below:
https://www.opticsplanet.com/evolution-gun-works-trijicon-rmr-sight-mount-1-780-in-aluminum.html

by Ethan, Gear Expert, November 19, 2024
Will this fit my XDME 10mm 4.5” pistol W/OSP Expert Answer

Yes, because you have an OSP model pistol, it will have included optic adapter plates to install a wide variety of optics. The Holosun 507-Comp uses the Trijicon RMR footprint. Using the Trijicon RMR adapter plate included with your pistol, you will be able to install this optic.

by Ethan, Gear Expert, March 26, 2024
Customer Reviews
Helpful Positive Review Perfect sight for competition. by T T, Verified Owner, August 1, 2023
Best reticle combinations yet for me for USPSA. I have 3 other Holosuns and this is a big improvement. Available with green or red reticle, green works best for me.Large window is also much better for quick target movement. Controls work the same as ...
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9/9 found this helpful
Helpful Positive Review Retired LEO, currently working for a private contractor for federal agency by Todd, Verified Owner, July 9, 2024
As always, Optics Planet comes through with competitive pricing and prompt delivery. The product, Holosun 507C (green), was a breeze to mount and easy to sight in. It is mounted on a Beretta A300 Ultima Patrol. This weapon will be used for home defen...
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1/1 found this helpful
Helpful Positive Review Pairs well with Staccato P for Competition by MikeT, Verified Owner, July 3, 2024
I had a 407K on my Staccato P that I replaced with the Comp for a larger field of view. I was concerned about the wide overhang on the slide but it really pairs nicely. The battery drawer screw seems susceptible to loosening like the K so use lockt...
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1/1 found this helpful
Helpful Positive Review Very pleased by Rhia, December 7, 2023
This red dot has awesome reticle choices. It’s new but I think it’s exactly what I’ve been looking for. I took it to the range mounted on my mark 4 pistol and right out of the box was hitting in the black at 50 feet. It’s going to be great for compet...
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2/2 found this helpful
Helpful Positive Review 4 Score and 2 years ago by Prpunisher, Verified Owner, March 13, 2024
This is my 4th Holosun optic purchase in 2 years and each never disappoints. I have the MRS, and the ACSS Vulcan reticle units and this is my 1st CRS reticle unit. What’s really great about this one are the 8 & 20 MOA circle options. The 32 MOA circl...
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4/4 found this helpful
Helpful Positive Review It's as Great as everyone says. by Manny, Verified Owner, March 19, 2024
Bought this for my wife's full size pdp that she uses for uspsa. The window is huge and the glass is clear. She didn't have any issue finding the dot like she has in the past with the 507C. We love that one as well. It has too many reticles to mentio...
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1/1 found this helpful
Read All 43 Reviews

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Our customers have spoken – this is one of the best rated products in the Red Dot Sights & Accessories category! See more best rated Red Dot Sights & Accessories products
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Product Info for Holosun Open Reflex Optical Sight

507Comp-RD/507Comp-GR handgun sight features a large 1.1” x 0.87” objective lens for enhanced shooting performance and Holosun’s new Competition Reticle System (CRS) with Holosun’s 650nm Red/540nm Green Super LED and up to 50k hour battery life with a 1632 cell.image

CRS is an enhanced multi-reticle system with four components including a precision 2MOA dot, an 8MOA circle, 20MOA circle, and 32MOA circle with multiple combination settings to suit individual shooter preference.  507Comp-RD/507Comp-GR is made from 7075 aluminum with an industry standard footprint, and includes Shake Awake technology

Shake Awake Technology is a standard feature on all current model Holosun optics and serves to extend battery life by deactivating the optic’s LED while not in use. A highly sensitive motion sensor works to detect motion keeping the LED powered on during use. This allows for duty or concealed carry with seamless operation throughout your day or shift. At the end of your day or shift when your firearm is stored, the motion sensor will detect a motionlessness state and after 10 minutes (default setting) Shake Awake Technology powers the LED off until motion is again detected. Shake Awake offers settings from 10 minutes to 12 hours depending on the model and can be deactivated altogether if preferred. The slightest touch of the optic instantly reactivates the LED so your Holosun optic is ready when needed.

Specifications for Holosun Open Reflex Optical Sight:

Manufacturer: Holosun
Color: Black
Finish: Anodize
Fabric/Material: 7075 T6 Aluminum
Magnification: 1 x
Objective Window Size: 1.1x0.87 in
Reticle: 2 MOA Dot
Illumination Type: LED
Eye Relief: Unlimited
Adjustment Click Value: 1 MOA
Emitter Type: Open
Parallax: Parallax Free
Battery Type: CR1632, Lithium Metal
Battery Life: 50000 hours
Operating Temperature: -30 - 60 Celsius
Water Resistance Level: IP67
Length: 2.67 in
Width: 1.96 in
Height: 1.25 in
Weight: 1.7 oz
Red Dot Sights-Footprint: RMR
Vibration: 5000G
Housing/Frame Material: 7075 T6 Aluminum
Storage Temperature: -40 - 70 Celsius

Features of Holosun Open Reflex Optical Sight

  • Up to 50,000 Hour Battery Life
  • Shake AwakeTM Technology with Last Setting Recall
  • Enlarged Window for Enhanced Field Of View
  • Competition Reticle System (CRS): 2 MOA Dot w/ 8/20/32 MOA Circle - Parallax Free & Unlimited Eye Relief

Package Contents:

  • Holosun Open Reflex Optical Sight
  • T10 L Key
  • User Manual
  • CR1632 Battery
  • Lens Cloth

Holosun Open Reflex Optical Sight Orderable Models

List of Orderable Models

Holosun HE507COMP Open Reflex Optical Sight, 2 MOA Dot, Red CRS Competition Reticle, Black, HS507COMP , MPN: HS507COMP , UPC: 810047072928 , Code: 28Y-RD-HOROS-HS507COMP
Holosun HE507COMP Open Reflex Optical Sight, 2 MOA Dot, Green CRS Competition Reticle, Black, HE507COMP-GR , MPN: HE507COMP-GR , UPC: 810047072911 , Code: 28Y-RD-HOROS-HE507COMP-GR
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