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Questions & Answers
Will the HS510C cowitness with Troy micro sights? Expert Answer

This optic has a 1.41" optical center which is approximately an absolute co-witness for standard height AR iron sights. The Troy micro battle sights are lower than standard height iron sights so this red dot should be around a lower 1/3 co-witness with the Troy micro sights.

by Jonathan D., Gear Expert, September 9, 2019
What riser/mount would work for the HS510c if a Lower 1/3 Co Witness were desired? Expert Answer

Holosun does make a riser for the HS510C, unfortunately we do not carry it. Here is a link to the manufacturer's website for the item:

https://holosun.com/index.php?main_page=product_info&products_id=72

by Jonathan D., Gear Expert, March 22, 2018
Customer Reviews
Expert Review
Solid Reflex Sight by Matt S., Gear Expert, April 12, 2018
Pretty impressed with this sight. Good sized window and while I mostly run the circle dot reticle, I like having the option to switch to just a dot reticle. Controls are on the side and easy to use. Opposing side battery tray means you don't have t...
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15/17 found this helpful
Helpful Positive Review So you won"t go crazy too!!! by Big Shooter, Verified Owner, July 16, 2020
I have within the last 2 weeks purchased 2 HS510C Holosun red dot sights. 2 MOA dot w/ 65 MOA circle. I am retired law enforcement, and am familiar with red dot sights. I have Trigicon RMR red dots on 3 of my EDC pistols. I thought I was going crazy...
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11/19 found this helpful
Helpful Positive Review First Impressions by DoubleD, Verified Owner, November 30, 2016
Just received my HS510c in the mail after a 5 month wait, well worth it. The sight itself seems to be well built and fits snug on my upper receiver rail. It is important to note this is a REFLEX not a HOLOGRAPHIC sight. Holosun did their homework and...
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132/141 found this helpful
Helpful Positive Review Best bang for the buck red dot. by A.brown, Verified Owner, December 31, 2024
Love this optic its my 3rd one I've purchased over the years. Reliable and easy to setup. Would recommend for any short range setups ar, smgs.22s, shotguns.
1/1 found this helpful
Helpful Positive Review Holosun HS510C by Jesse Ewert, Verified Owner, December 9, 2023
My brother suggested this scope for my new AR style carbine for field of view relative to size having set up little further down the rail and being able to keep both eyes open while working it. Will take a little getting used to but I think he was on...
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3/3 found this helpful
Helpful Positive Review Solid Optic by Psidon, Verified Owner, November 1, 2024
I mounted this on a 300BLK pistol. Quickly sighted it in, and it has a nice, large viewing window to easily get on target. It's easy to keep both eyes open when using it. Battery life has been great, no concerns. Red dot is crisper than most other r...
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1/1 found this helpful
Read All 446 Reviews
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Holosun HS510C Riser, Black, HE/HS510C 1/3rd Riser
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Product Info for Holosun HS510C 1x0.91-1.2in Open Reflex Red Dot Sight

The Holosun HS510C Red Dot Sight sports a streamlined housing design with an open frame for a wide sight picture and minimized obstruction of vision. Built for use with carbines, PCCs, and shotguns, these Red Dot Sights from Holosun are available with a Red Super LED or Green Super LED that provides up to 50,000 hours of battery life. They are powered by Advanced Super Solar Technology with battery backup. Equipped with a protective titanium alloy hood, the Holosun HS510C open reflex optic is waterproof down to 1m and durable enough for even the heaviest calibers. Choose between three different reticles with the Multi-Reticle System (MRS), and experience the comfort of parallax-free views and unlimited eye relief.image

This HS510C Holosun red dot offers other innovations, such as Solar Failsafe which provides a backup reticle in case of a power failure and adjusts your red dot's brightness level based on ambient lighting conditions. With 12 total brightness settings, including two night vision modes, you can create a customized shooting experience for your hunting and range training adventures. Buy a Holosun HS510C red dot or green dot sight today to improve your target acquisition speeds and precision with your favorite long gun.

Does HS510C Have Shake Awake?

The Holosun HS510C does feature Shake Awake Technology. Shake Awake uses a highly sensitive motion sensor that keeps your optic powered on when it senses motion and powers it off when not in use.

How Far Can You Shoot with a Holosun 510C?

While designed for long guns, the Holosun 510C isn’t magnified, so it is most effective at 100 yards or less. However, using the HS510C with a red dot magnifier can greatly increase the effective range.

WARNING: California`s Proposition 65

Specifications for Holosun HS510C 1x0.91-1.2in Open Reflex Red Dot Sight:

Manufacturer: Holosun
Finish: Matte
Fabric/Material: 6061 Aluminum with Titanium Hood
Magnification: 1 x
Objective Lens Diameter: 0.91 - 1.2 in
Objective Window Size: 0.91x1.2 in
Reticle: 2 MOA dot 65 MOA Circle
Illumination Type: LED
Brightness Settings: 12
Eye Relief: Unlimited
Adjustment Type: MOA
Adjustment Click Value: 0.5 MOA
Emitter Type: Open
Parallax: Parallax Free
Optical Coating: Multi-Coated
Battery Type: CR2032
Battery Life: 20,000 - 50,000 hours
Operating Temperature: -22 - 140 Fahrenheit
Water Resistance Level: IP67
Length: 3.3 in
Width: 1.6 in
Height: 1.8 in
Weight: 4.94 oz
Condition: New
Magnification Type: Fixed
Quantity: 1
Red Dot Sights-Footprint: Not Applicable
W/E Travel at 100 Yds: +/-50 MOA
Attachment Type: Quick Detach

Features of Holosun Red Dot Scope, Multiple Reticles HS510C:

  • Multiple Reticle System featuring 3 reticles;
  • Parallax free optical design, with unlimited eye relief;
  • Minimized obstruction of vision with push button controls and a streamlined housing design;
  • Motion Sensor with Shake Awake or can stay on until manually turned off;
  • Internal battery tray design;
  • 32mm×24mm open lens;
  • Solar cell and high capacity battery provide dual power supplies;
  • Titanium-alloyed, shock resistant protective hood;
  • Quick release mount

Package Contents:

  • Holosun HS510C Micro Red Dot Sight with 3 Reticle Options
  • Mount
  • Battery tray
  • Adjustment tool
  • Torx wrench

Holosun HS510C 1x0.91-1.2in Open Reflex Red Dot Sight Orderable Models

List of Orderable Models

Holosun HS510C Open Reflex Sight 1x, 2 MOA Dot, 65 MOA Circle Reticle, Black HS510C , MPN: HS510C , UPC: 605930624571 , Code: 28Y-RD-HBNV-HS510C
Holosun HS510C 1x, Open Reflex Sight, Red 2 MOA dot 65 MOA Circle Reticle, Flat Dark Earth, HS510C-FDE-R , MPN: HS510C FDE , UPC: 605930624991 , Code: 28Y-RD-HBNV-HS510C-FDE-R
Holosun HS510C 1x, Open Reflex Sight, Green 2 MOA dot 65 MOA Circle Reticle, Flat Dark Earth, HS510C-FDE-G , MPN: HS510C-GR FDE , UPC: 605930624953 , Code: 28Y-RD-HBNV-HS510C-FDE-G

Holosun HS510C 1x0.91-1.2in Open Reflex Red Dot Sight Unavailable & Discontinued Models

List of Unorderable Models

Holosun OPMOD HS510C Red Dot Sight, Red MRS, 2 MOA Dot, Wolf Grey , MPN: 28Y-RD-OPAEM3-HS510C-WG-KIT2023 , Code: 28Y-RD-HBNV-28Y-RD-OPAEM3-HS510C-WG-KIT2023
Holosun OPMOD HS510C Red Dot Sight, Green MRS, 1x30 mm, 2 MOA Dot, Wolf Grey , MPN: 28Y-RD-OPAEM3-HE510C-GR-WG-KIT2023 , Code: 28Y-RD-HBNV-28Y-RD-OPAEM3-HE510C-GR-WG-KIT2023
Holosun Circle Dot Open Reflex Sight,2 MOA Dot,65 MOA Circle,91x65x40mm, Black HS510C with American Defense Manufacturing Holosun 510C Quick Detach Mount , MPN: HS510C-KIT1 , Code: 28Y-RD-HBNV-HS510C-KIT1
Holosun Circle Dot Open Reflex Sight,2 MOA Dot,65 MOA Circle,91x65x40mm, Black HS510C with American Defense Manufacturing Holosun 510C Titanium Quick Detach Mount , MPN: HS510C-KIT2 , Code: 28Y-RD-HBNV-HS510C-KIT2

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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