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Questions & Answers
Is it suitable for a Glock 40 MOS 10mm Auto? Thanks Expert Answer

To mount the Holosun HS507K Compact Pistol Red Dot Sight to your Glock 40 MOS, you will need to use the C&H Precision Weapons V4 MIL/LEO Adapter Plate (linked below). Keep in mind that this optic was designed for micro pistols, while your Glock 40 can accept optics with full sized footprints such as the RMR, Deltapoint Pro, Docter, and C-More footprints.
https://www.opticsplanet.com/c-h-precision-weapons-v4-mil-leo-adapter-plate.html?_iv_optic-cut=holosun-507k&_iv_gun-model=glock-17-mos

by Ethan, Gear Expert, October 7, 2024
Will it fit my fn 502 Expert Answer

The Holosun HS507K Compact Pistol Red Dot Sight will fit the FN 502.

by Hunter, Gear Expert, September 22, 2023
Customer Reviews
Helpful Positive Review clear glass, bright reticle, fast target acquisition by Hrpman, Verified Owner, March 4, 2025
I bought this Holosun for one of my wife's target pistols and after getting it mounted and zeroed i think i might upgrade a couple of my other Holsuns to the acss reticle, i have astigmatism in both eyes and dont have any problems with the crispness ...
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2/2 found this helpful
Helpful Positive Review HS507k x2 ACSS = rambo mode by BobDolesGhost, April 21, 2023
Ok, it won't make you Rambo - but it has improved my draw to first shot and my 15yards+ shot accuracy significantly. It was waaay off zero after I mounted the optic, but was extremely easy to set on the right path. I put the 507k on my new Canik MC9,...
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12/12 found this helpful
Helpful Positive Review Unique Optic by Eric, Verified Owner, January 26, 2025
This optic has a special type of redicle. It encircles the dot with a circle that just fits within the full screen. The advantage is that you can never lose the DOT. If the DOT is off screen the part of the circle still visible drags your eye direct...
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1/1 found this helpful
Helpful Positive Review great product, by minnj, Verified Owner, December 22, 2024
Installed with optics plate, needed fair amount of windage and elevation adjustments but it was easy to adjust the dot with included tool. Very clear sight picture. The outer ring is extremely helpful in finding the dot, and you can turn it off as we...
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1/1 found this helpful
Helpful Positive Review Holosun 507k ACSS Vulcan reticle by J, Verified Owner, December 8, 2024
This micro red dot is a great Holosun product but what sets it apart is the Primary Arms ACSS reticle. Its got a large dashed circle that hovers at the outer edge of the screen that directs the shooter to the center aiming dot. For those who recogn...
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1/1 found this helpful
Helpful Positive Review Valuable feature by Barron, September 27, 2023
The ACSS is perfect for the Sig P365 SAS because it has no iron sights and it's easy to pick up the red dot quickly. I have two slides for the SAS, one with the bullseye recessed site and one with this optic mounted.
2/2 found this helpful
Read All 68 Reviews
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Product Info for Holosun HS507K Compact Pistol 2x 0.58 x 0.77 in Reflex Red Dot Sight

Made as a collaboration between Holosun Optics and Primary Arms Optics, the illuminated HE507K with ACSS Vulcan Dot Reticle brings the revolutionary Vulcan aiming system to a micro reflex footprint.image

Designed for concealed carry, the HE507K is lightweight, durable, and dependable, with up to a 40,000-hour runtime on medium settings. This sight retains all the core features and technologies of the standard Holosun model, including the Multi-Reticle System, Shake Awake technology, and a built-in Lock Mode. With 12 illuminated brightness settings and intuitive push-button controls, the HE507K works in any lighting condition and is even compatible with night vision devices.

This co-branded optic features the ACSS Vulcan Dot reticle system, which improves acquisition and recovery speed through its patented outer reference circle. When aimed on-target, the ACSS Vulcan Dot reticle appears as a simple, unobtrusive 3 MOA dot. When your aim is off-target, the edge of the 230 MOA outer circle guides you back to center. ACSS Vulcan Dot alleviates one of the main weaknesses of micro reflex optics, ensuring you can always find your reticle aiming point, despite the smaller optical aperture.

The HE507K with ACSS Vulcan Dot Reticle features an RMSc footprint and is natively compatible with many of the most popular concealed carry pistols.

WARNING: California`s Proposition 65

Specifications for Holosun HS507K Compact Pistol 2x 0.58 x 0.77 in Reflex Red Dot Sight:

Manufacturer: Holosun
Color: Black
Finish: Hard Coat Anodized
Fabric/Material: 7075-T6 Aluminum
Magnification: 1 x
Objective Lens Diameter: 0.58 - 0.77 in
Objective Window Size: 0.58x0.77 in
Reticle: 3 MOA Dot, ACSS Vulcan
Illumination Type: LED
Brightness Settings: 12
Eye Relief: Unlimited
Adjustment Type: MOA
Adjustment Click Value: 1 MOA
Parallax: Parallax Free
Optical Coating: Multicoated
Battery Type: CR1632
Battery Quantity: 1
Battery Life: 50,000 hours
Water Resistance Level: IP67
Weight: 1 oz
Condition: New
Package Type: Box
Magnification Type: Fixed
Brightness Index: 12
Quantity: 1
Red Dot Sights-Footprint: RMS

Features of Holosun HS507K Compact Pistol 2x 0.58 x 0.77 in Reflex Red Dot Sight:

  • Ultra-compact size for concealed carry applications
  • Two Reticle Settings: Dot + Circle, and Dot only
  • Shake Awake - Motion on with last setting recall
  • Parallax-free, unlimited eye relief
  • 10 daylight and 2 night vision compatible brightness settings
  • IP67 Certified

Package Contents:

  • Holosun HS507K Compact Pistol 2x 0.58 x 0.77 in Reflex Red Dot Sight

Holosun HS507K Compact Pistol 2x 0.58 x 0.77 in Reflex Red Dot Sight Orderable Models

List of Orderable Models

Holosun HS507K Compact Pistol Reflex Red Dot Sight, 2x 0.58 x 0.77 in, MOA Red ACSS Vulcan Reticle, Black, HS507K-X2-ACSS , MPN: HS507K-X2-ACSS , UPC: 810047072393 , Code: 28Y-RD-SG55-HS507K-X2-ACSS
Holosun HS507K Compact Pistol Reflex Red Dot Sight, 2x 0.58 x 0.77 in, 3 MOA Green ACSS Vulcan Reticle, Black, HE507K-GR-X2-ACSS , MPN: HE507K-GR-X2-ACSS , UPC: 810047072409 , Code: 28Y-RD-SG55-HE507K-GR-X2-ACSS

Proposition 65 Warning for California Consumers

For more information go to www.p65warnings.ca.gov

Notification

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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