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Questions & Answers
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
will this fit my fn fnx tactical 45 foot print Expert Answer

Yes, the Holosun Open Reflex Optical Sight uses the Trijicon RMR footprint. Your FNX-45 Tactical included adapter plates to install optics, you would need to use the #2 MRD plate and install it on your slide using the #511 screw set (Included with your FN). Once the plate is installed, you can fit this optic to your slide.

by Ethan, Gear Expert, October 12, 2023
Customer Reviews
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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3/3 found this helpful
Helpful Positive Review Holosun 507 Comp Red by John Brewer, Verified Owner, November 9, 2023
This is amazing!! I already have a 507k on my 365XL and love it. I took up USPSA shooting and needed an optic, just didn’t see any reason to leave the brand I was happy with. Boy all I can say is, this thing is a beast!! Super quick target acqui...
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2/2 found this helpful
Helpful Positive Review Excellent optic! by Cj, Verified Owner, January 5, 2024
The size of the window on this sight makes finding the dot after each shot very easily. As with all the holosun optics I've purchased the build quality is excellent. I mounted this optic on a sig p320 m17. With a rest I can constantly knock down 6 in...
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1/1 found this helpful
Helpful Positive Review Holosun comp green by Chris, February 4, 2024
Paired this up with a shadow 2 optics ready, put about 400 rounds through it today. Loved it,faster than my Glock with a 507 holosun that I've been shooting for years in competition. Immediately knocked off tenths of seconds right out of the box.
1/1 found this helpful
Helpful Positive Review Worth every dollar by Justin Martinez, Verified Owner, January 19, 2024
A true competitor to the Trijicon SRO for a couple hundred less. The build quality, dot options, and screen size is everything I hoped it would be. I can't recommend this enough. You will not be dissappointed.
2/2 found this helpful
Helpful Positive Review Dot, Circle options to meet competitive needs by Steve, Verified Owner, October 31, 2023
I wanted a smaller circle for rapid accusation and centering on targets. The 8 MOA meets that need.
2/2 found this helpful
Read All 32 Reviews

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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: Lithium Metal, CR1632
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

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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