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Questions & Answers
Will this mount on a S&W M&P Compact 2.0 Optics Ready Pistol? Expert Answer

To fit the Holosun 407K to a C.O.R.E. model M&P, you would need to use an adapter plate by CHPWS that converts your optic cut to the 407K footprint. With that plate, you can fit this Holosun 407K as well as the Holosun 507K.

by Ethan, Gear Expert, June 10, 2022
Will this fit a Mossberg 940 Pro Tactical? It has factory shade cuts. Expert Answer

The Mossberg 940 Pro Tactical has a receiver mounting slot for red dots that have the Shield RMSc footprint. The Holosun HE507K-GR X2 Red Dot Reflex Sight uses a slightly modified Shield RMSc footprint so it may fit the optics mount on that shotgun but slight modification may be needed to fit properly.

by Hunter, Gear Expert, May 31, 2022
Customer Reviews
Helpful Positive Review Great sight on Sig P365XL by Phil, Verified Owner, December 4, 2022
I love this thing. Bolted right onto my Sig P365XL everyday carry pistol (with its optics cut slide) in just a few minutes, needing a 5/64" hex wrench to remove the Sig rear sight. Small, fits very low, protrudes less than .80" above this slide. I pr...
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31/32 found this helpful
Helpful Positive Review Works great, fits my sig p365 by Slugtrail, Verified Owner, February 2, 2025
Bought this reflex optic to replace a polymer one I had. Cant recommended polymer but this one is great, sits flat on the slide and holds zero. Very clear dot. Holosun optic is where its at.
1/1 found this helpful
Helpful Positive Review Excellent red dot by A, Verified Owner, April 22, 2024
Great design works perfect with hellcat pro. Would buy again
3/3 found this helpful
Helpful Positive Review Great for Hellcat OSP! by Brandon Tilley, Verified Owner, January 1, 2025
Bought this for my Hellcat OSP along with the DPP adapter plate. Fits snug and you can still get a close Cowitness. LOVE the 3 reticles choices!
1/1 found this helpful
Helpful Positive Review Holosun optic by Shayne Becker, November 7, 2024
So far so good I like the size and the dot is bright! Fits well on my zaffiri precision Glock 43x slide.
1/1 found this helpful
Helpful Positive Review Install on my SIG P365 X Marco Comp by Tucson Patriot, Verified Owner, November 24, 2024
The installation was very straightforward as the P365 allows direct mounting of the 507k. No plates and no loss of the rear sight. It also co-witnesses lower 1/3. Best to use an inch pound torque wrench to seat it properly, but otherwise it was simpl...
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3/3 found this helpful
Read All 206 Reviews
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Product Info for Holosun HE507K-GR X2 1x Green Dot Reflex Sight

The Holosun HE507K-GR X2 1x Green Dot Reflex Sight is a powerful open reflex sight designed specifically for concealed carry handguns. These Red Dot Sights from the experts at Holosun feature a green reticle color with Super LED technology that improves target acquisition speeds in any lighting conditions. This HE507K-GR X2 1x Green Dot Reflex Sight is equipped with Lock Mode, which prevents accidental button presses and setting changes when activated. Multilayer Reflective Coatings ensure maximum light transmission and glare-free views in all environments.image

This sub-compact optic boasts tons of Holosun tech like Shake Awake Technology that powers the optic on when it senses motion and powers down when it does not, resulting in a much longer battery life. The Holosun HE507K-GR X2 1x Green Dot Reflex Sight also features the Multi-Reticle system that allows you to seamlessly switch between a circle dot reticle, 2 MOA dot only reticle, and a 32 MOA circle reticle only. With 12 brightness settings, including two that are compatible with night vision devices, you can customize your brightness level to best match your ambient lighting conditions. Pick up this HE507K-GR X2 1x Green Dot Reflex Sight today to improve your speed and precision with your CCW pistol.

Specifications for Holosun HE507K-GR X2 1x Green Dot Reflex Sight:

Manufacturer: Holosun
Color: Black
Finish: Anodized
Fabric/Material: 7075-T6 Aluminum
Magnification: 1 x
Objective Lens Diameter: 0.58 - 0.77 in
Illumination Type: LED
Eye Relief: Unlimited
Adjustment Type: MOA
Adjustment Click Value: 1 MOA
Emitter Type: Open
Battery Quantity: 1
Water Resistance Level: IP67
Weight: 1 oz
Condition: New
Magnification Type: Fixed
Quantity: 1
Red Dot Sights-Footprint: RMS

Features of Holosun HE507K-GR X2 Green Dot Reflex Sight:

  • MRS: Circle Dot; 2 MOA Dot; 32 MOA Circle
  • Up to 50,000 Hours Battery Life (Setting 6)
  • 12 Brightness Setting: 10 DL & 2 NV Compatible
  • Convenient Tray Battery Compartment
  • Parallax-free & Unlimited Eye Relief
  • Designed for CCW
  • IP67 Waterproof

Package Contents:

  • Holosun HE507K-GR X2 Green Dot Reflex Sight
  • Multi-Tool
  • Lens Cloth
  • User Manual

Holosun HE507K-GR X2 1x Green Dot Reflex Sight Orderable Models

List of Orderable Models

Holosun Sub-compact HS507K-X2 Dot Red Dot Sight, 1x, 2 MOA, Black, HS507K-X2 , MPN: HS507K X2 , UPC: 810047071211 , Code: 28Y-RD-HRS2-HS507K-X2
Holosun HE507K-GR X2 Green Dot Reflex Sight 1x, Green Circle Dot/ 2 MOA Dot/ 32 MOA Circle Reticles, Anodized, Black, HE507K-GR X2 , MPN: HE507K-GR X2 , UPC: 810047071389 , Code: 28Y-RD-HRS2-HE507K-GR-X2
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