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HOLOSUN 510C & HM3X Combo RED/Green Multi-Reticle Circle Dot Open Reflex Sight w/3x Flip-to-Side Magnifier 510C-HM3X

  • Based on 23 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Aug 10
Order within 20 hours and 31 minutes
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Color: BLACK


Style: GREEN RETICLE


Features

  • ADVANCED TECHNOLOGY: The Holosun HS510C New advanced technology LED allows up to 50,000 hours of operation on one CR2032 battery.
  • PROTECTIVE TITANIUM ALLOY HOOD: The Holosun HS510C Circle Dot Scope with 3 Reticle Options is waterproof down to 1m and durable enough for even the heaviest calibers.
  • EASY USE: The reticle can be switched between a 65 MOA circle with 2 MOA dot, a 2 MOA dot only, or a 65 MOA ring only at the push of a button. Better yet, the same LED projects both reticles, so no re-zeroing is necessary.
  • COMBO SET: Includes Holosun HS510c Reflex Sight, Holosun HM3X 3X Magnifier and a protective storage case.
  • PROTECTIVE STORAGE CASE: Includes protective storage case so you can keep your Holosun items safe at all times.

Description

The Holosun 510C & HM3X Combo provides a versatile and rugged sighting system designed for optimal performance in long gun applications. The 510C, a high- quality open reflex sight, pairs perfectly with the HM3X, a 3X magnifier, delivering unmatched flexibility and precision for tactical professionals, competitive shooters, and outdoor enthusiasts alike. This combo offers a seamless solution for close-range and mid-range engagements. The 510C features an aluminum housing with a titanium hood, ensuring durability and shock resilience in demanding environments. It includes advanced features like Solar Failsafe, Shake Awake Technology, and a Multi-Reticle System (MRS), allowing users to choose between a 2 MOA dot, 65 MOA circle, or a circle-dot combination for precise targeting. With a SuPer LED, the HS510C provides up to 50,000 hours of battery life on a single CR2032 battery, and 10 daylight and 2 NV compatible brightness settings for all lighting conditions. Paired with the HM3X, this combo extends your range with 3X magnification and a flip-to-the- side design for quick adjustments between close and medium-range targets. The HM3X features a QD mount, compatibility with both absolute and lower 1/3 co- witness optics, and provides 2.75” eye relief for comfortable viewing. It is also IP67 waterproof and shockproof, making it reliable in harsh conditions. Together, the 510C & HM3X Combo is an ideal solution for those seeking a rugged, flexible, and high-performance optic system for a variety of shooting scenarios.

Brand: HOLOSUN


Color: BLACK


Style: GREEN RETICLE


Sport: Hunting


Item Weight: 16 ounces


Material: Aluminum, Titanium Hood


Magnification Maximum: 3 x


Magnification Minimum: 3 x


Compatible Devices: Rifle


Mounting Type: Picatinny, Weaver


Magnification Maximum: 3 x


Magnification Minimum: 3 x


Compatible Devices: Rifle


Mounting Type: Picatinny, Weaver


Eye Relief: 7 centimeters


Reticle Type: Dot & Circle


Item Weight: 16 ounces


Material Type: Aluminum, Titanium Hood


Color: BLACK


Product Style: GREEN RETICLE


Lens Color: Green


Brand Name: HOLOSUN


Sport Type: Hunting


Model Name: 510C / HM3X COMBO


Manufacturer: Holosun


Number of Items: 3


Unit Count: 1 Count


UPC: 810047073536


Global Trade Identification Number: 36


Included Components: Lens Cloth, Riser, Tool


Model Number: HE510C-GR-HM3X-Holosun


Manufacturer Part Number: HE510C-GR/HM3X


Warranty Description: Limited Lifetime Manufacturer Defective Warranty


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Aug 10

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great optic combo, highly recommend
Color: BLACK Style: GREEN RETICLE
I may be biased in that I already have several Holosun optics and wanted this for a rifle since I am familiar with them already. This is a great optic, with quick connect/disconnect (just flip a lever that is adjustable for tension and it comes off), both for the optic and for the magnifier. That was important since I do a lot of close shooting (less than 25 yards), so I wanted to be able to take the magnifier off and put it on easily. Also, I have a low mount picatinny rail that they are mounted on so I can’t co-witness with the iron sights with the optic on, but if it ever fails it is so easily removed that it’s not really an issue. Easy to mount, easy to zero and easy to use. I like having the option of either dot with circle (close) or just dot (farther away or for better accuracy) as well as adjustable brightness. The only negative is that the buttons on the side to adjust brightness and circle/dot are not that easy to feel in order to use when trying to look through the optic. ... show more
Reviewed in the United States on February 25, 2026 by Amazon Customer

  • Great combo!!
Color: BLACK Style: GREEN RETICLE
This combo is a quality setup. Easy to Mount and adjust. The price is very reasonable for the quality and ease of use from this sight. I will definitely be buying this again
Reviewed in the United States on May 2, 2026 by BigUglyProp

  • Great combo
Color: BLACK Style: GREEN RETICLE
Quick shipping. Great product. Great value too.
Reviewed in the United States on July 2, 2026 by Bill

  • Perfect reticle, soood build
Color: BLACK Style: GREEN RETICLE
The perfect combo, like the green dot and the multi reticle, magnifier is solid as well, good eye relief compared to any other 3x magnifier
Reviewed in the United States on December 16, 2025 by adam khedr

  • Nice
Color: BLACK Style: GREEN RETICLE
Great sight!
Reviewed in the United States on May 17, 2026 by jason

  • Optics
Color: BLACK Style: GREEN RETICLE
Absolutely love it. Also it co witnessed well with my a2 iron front sight
Reviewed in the United States on May 25, 2026 by Tre vincent

  • Horrible
Color: BLACK Style: GREEN RETICLE
The reticle was jacked up right out of the box. It was supposed to be a green dot sight, not a green 5 dot sight. I sent it back and am still waiting for a refund to buy a different sight.
Reviewed in the United States on April 17, 2026 by Nathan S.

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