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SKU#510C&HM3X Holosun
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Holosun HS510C Quick Detach Red Dot Sight w/ Picatinny Mount - Includes HM3X 3x Magnifier

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The Holosun HS510C + HM3X combo is basically a full “close-to-mid range” setup in one package. You get the HS510C’s big open window and fast 2 MOA red dot for quick shooting, plus the HM3X magnifier for when you need to stretch things out to distance without swapping optics. It’s a smooth flip-to-side system, so you can go from 1x to 3x in a second, and both pieces are built tough with solid glass and durable housings. Add in solar backup, shake-awake tech, and quick-detach mounting, and it’s a versatile, do-it-all rifle setup that works well for range days, training, or general use without overcomplicating things.

-Nathan (Technical Advisor)

images/assets/pdp-refresh/delivery-clock.svg We aim to dispatch in-stock items to our Ireland-based Logistics Warehouse for EU dispatch within 1-3 working days. images/assets/pdp-refresh/UK-retailer.svg Authorised UK Retailer
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Product Information FIND OUT MORE
DESCRIPTION

Experience unparalleled versatility and performance with the Holosun HS510C Quick Detach Red Dot Sight paired with the HM3X 3x Magnifier. Crafted for long gun applications, this optic is a formidable addition to carbines, PCCs, and shotguns, built to endure the demands of rigorous use. Its rugged aluminum housing, fortified with a titanium hood, ensures exceptional shock resilience, guaranteeing reliability in any scenario.

Embedded with cutting-edge technology, the HS510C stands out among its peers. Solar Failsafe technology ensures continuous operation by harnessing natural or artificial light, seamlessly adjusting reticle intensity based on ambient conditions. Coupled with a super capacitor, this feature enables indefinite functionality, eliminating dependence on batteries.

Battery longevity is further extended with Shake Awake Technology, conserving power during inactivity and swiftly reactivating with the slightest motion. With customizable settings ranging from 10 minutes to 12 hours, it ensures seamless operation during duty or concealed carry.

Featuring the Multi-Reticle System (MRS), the HS510C offers versatile aiming solutions with Circle Dot, 2 MOA Dot, and 65 MOA Circle options. With up to 50,000 hours of battery life and 12 brightness settings, including 2 for night vision compatibility, it provides optimal performance in varying lighting conditions.

In the package, alongside the HS510C, you'll find an Absolute Cowitness QD Mount for swift attachment, a T10 L Key for adjustments, a user manual for comprehensive guidance, a CR2032 battery for immediate use, and a lens cloth for maintenance.

With optical specifications like parallax-free operation, unlimited eye relief, and multi-coatings for enhanced clarity, the HS510C ensures precision and reliability in every shot. Its compact design minimizes added bulk to your firearm, measuring 3.3x1.68x1.78 inches and weighing just 4.94 ounces.

Engineered to withstand harsh environments, the HS510C boasts an IP67 submersion rating, resisting water ingress up to 1 meter for 30 minutes, along with exceptional vibration resistance up to 1000G. Whether facing extreme temperatures or adverse conditions, it delivers consistent performance when it matters most.

Included with the HS510C is the HM3X, an aluminum-bodied 3X magnifier designed for use with a red dot sight. Equipped with a quick-release, ambidextrous, flip-to-side Picatinny rail mount, the HM3X ensures swift deployment. Holosun provides a spacer for compatibility with absolute and lower 1/3 co-witness dot heights, enhancing versatility. With generous eye relief, IP67 certification, and windage and elevation adjustment, the HM3X ensures precision zeroing for optimal performance in any scenario. Additionally, it features a built-in flat driver tool for effortless adjustments.

SPECS
HS510C Red Dot Sight:

OPTICAL SPECS

  • Reticle: 2 MOA Dot & 65 MOA Circle
  • Light Wavelength: 650nm
  • Reticle Color: Red
  • Parallax Free: Yes
  • Unlimited Eye Relief: Yes
  • Magnification: 1x
  • Multi-Coatings: Yes


ELECTRONIC SPECS

  • Power Source: Battery
  • Battery Type: CR2032
  • Battery Life (Hours): 50000
  • Brightness Setting: 10 DL & 2 NV


PHYSICAL SPECS

  • Window Size: 0.91x1.26
  • Dimension (in): 3.3x1.68x1.78
  • Weight (oz): 4.94


MECHANICAL SPECS

  • Housing Material: Aluminum & Titanium Hood
  • Surface Finish: MAO
  • Adjustment per Click: 0.5 MOA
  • W&E Travel Range: ±50 MOA


ENVIRONMENT SPECS

  • Storage Temperature: -40℃~70℃
  • Working Temperature: -30℃~60℃
  • Submersion: IP67
  • Vibration: 1000G

HM3X 3x Magnifier:

PHYSICAL SPECS

  • Window Size: N/A
  • Dimension (in): 4 x 1.7 x 2.5
  • Weight (oz): 9.8


MECHANICAL SPECS

  • Housing Material: Durable Aluminum
  • Surface Finish: MAO
  • Adjustment per Click: N/A
  • W&E Travel Range: N/A


ENVIRONMENT SPECS

  • Storage Temperature: -20℃~65℃
  • Working Temperature: -20℃~51℃
  • Submersion: IP67
  • Vibration: 1000G


MAGNIFICATION SPECS

  • Transmittance: 75%
  • Diopter: ±3D
  • Field of View: 7 Degree
  • Eye Relief: 70mm
  • Exit Pupil: 7.6mm
  • Magnification: 3X
FEATURES
HS510C Red Dot Sight:

Solar Failsafe™
Solar Failsafe Technology is one of many innovations featured on solar-equipped Holosun optics. With Solar Failsafe, if your battery fails you always have a backup power source when natural or artificial light is available. Solar Failsafe is activated while in Auto Mode where reticle intensity is automatically adjusted based on the amount of light the solar cell receives. In brighter conditions you have a brighter reticle and in lower-light conditions the reticle will step down in intensity to match any lighting conditions. On models equipped with a super capacitor, it is possible to run the optic, indefinitely, in daytime and night conditions, by maintaining a charge through the Solar Failsafe System all without a battery.

Shake Awake™
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.

  • MRS: Circle Dot; 2 MOA Dot; 65 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

HM3X 3x Magnifier:

  • Flip-to-the-side Design
  • Outstanding Specification & Clarity
  • QD Mount & Spacer included
  • IP67 Waterproof
RETICLE
WHAT'S IN THE BOX

Holosun HS510C Quick Detach Red Dot Sight w/ Picatinny Mount
  • Holosun HE510C Quick Detach Red Dot Sight w/ Picatinny Mount
  • Absolute Cowitness QD mount
  • User manual
  • Lens cloth
  • T10 L key
  • CR2032 battery

HM3X 3x Magnifier
  • HM3X 3x Magnifier
  • QD Release mount
  • User manual
  • T10 L Key
FREQUENTLY ASKED QUESTION(S)

1. What comes in the HS510C + HM3X combo?
You get the HS510C red dot sight, the HM3X 3x magnifier, mounts, and usually a hard case depending on the package.

2. What is the HM3X used for?
It adds 3x magnification behind your red dot so you can engage targets at longer distances without changing optics.

3. How does the flip-to-side magnifier work?
The HM3X swings out of the way when you don’t need magnification and flips back in line when you do.

4. Does the red dot need re-zeroing when using the magnifier?
No, the magnifier just enlarges the existing dot image—it doesn’t change zero.

5. What reticle does the HS510C use?
It has a multi-reticle system with a 2 MOA dot and 65 MOA circle, or combinations of both.

6. Is it good for close and long-range shooting?
Yes, the red dot is fast for close range, and the magnifier helps extend usable distance.

7. How durable is the combo?
Both units are built with aluminum/titanium-reinforced construction and are designed for recoil and rough use.

8. Does it have solar backup?
Yes, the HS510C includes Solar Failsafe, which helps power the optic in good lighting.

9. How long does the battery last?
Up to about 50,000 hours depending on settings and usage.

10. Is it heavy or bulky?
It’s noticeably heavier than a simple red dot alone, but that’s expected for a magnifier combo setup.

WARRANTY
DELIVERY & RETURNS
Shipping to Europe

Delivery costs & estimated arrival

Find your country below for the delivery charge and how long your order should take to reach you. All orders ship with FedEx. Estimates are in working days and exclude weekends and public holidays.

Country Up to 2kg 2kg – 30kg Estimated delivery
Order under €350 Order €350 & over Order under €350 Order €350 & over
Austria€11.95€26.95€26.95€26.955-7 working days
Belgium€8.95€14.95€14.95€14.954-6 working days
Bulgaria€11.95€31.95€31.95€31.957-9 working days
Croatia€11.95€31.95€31.95€31.956-8 working days
Cyprus€14.95€89.95€89.95€89.95Contact us
Czechia€10.95€21.95€21.95€21.955-7 working days
Denmark€10.95€21.95€21.95€21.954-6 working days
Estonia€11.95€31.95€31.95€31.956-8 working days
Finland€11.95€26.95€26.95€26.955-7 working days
France€10.95€21.95€21.95€21.954-6 working days
Germany€8.95€14.95€14.95€14.955-7 working days
Greece€11.95€31.95€31.95€31.958-10 working days
Hungary€11.95€31.95€31.95€31.955-7 working days
Ireland€6.95€6.95€8.95€8.952-4 working days
Italy€10.95€21.95€21.95€21.955-7 working days
Latvia€11.95€31.95€31.95€31.956-8 working days
Lithuania€11.95€31.95€31.95€31.956-8 working days
Luxembourg€11.95€31.95€31.95€31.955-7 working days
Malta€14.95€89.95€89.95€89.95Contact us
Monaco€10.95€21.95€21.95€21.954-6 working days
Poland€10.95€21.95€21.95€21.955-7 working days
Romania€11.95€31.95€31.95€31.956-8 working days
Slovakia€11.95€31.95€31.95€31.955-7 working days
Slovenia€11.95€31.95€31.95€31.956-8 working days
Spain€11.95€26.95€26.95€26.955-7 working days
Sweden€11.95€26.95€26.95€26.955-7 working days

Returns & withdrawal

Which option you use depends on why you are sending the item back.

Changed your mind?

You have 14 days from receiving your order to withdraw from your purchase. Use our Withdrawal from Contract form to tell us. It is the quickest way, and we will then email you a free returns label.

If you would rather post the item back yourself to our returns address in Ireland, you pay the postage. Full details are on our Returns page.

Withdrawal from Contract

Faulty, damaged or wrong item?

If your item arrived faulty, damaged or not what you ordered, please follow the steps on our Returns page. We cover the cost of returning these items.

Full details of all our return options are on that page.

Returns page

Delivery prices are shown in euros and confirmed at checkout.

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Product safety information is available on request from our customer service team.

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