HOLOSUN HS510C & HM3X Combo Multi-Reticle Circle Dot Open Reflex Sight w/3x Flip-to-Side Magnifier 510C-HM3X
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Tuesday, Nov 25
Description
Holosun HS510C & HM3X Combo Multi-Reticle Circle Dot Open Reflex Sight w/3x Flip-to-Side Magnifier 510C-HM3X
Package Dimensions : 9.09 x 6.85 x 3.82 inches; 4.96 ounces
Batteries : 1 CR2 batteries required. (included)
Date First Available : November 12, 2019
Manufacturer : Holosun
Best Sellers Rank: #17,616 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #50 in Gun Sights
#50 in Gun Sights:
Customer Reviews: 4.8 4.8 out of 5 stars 940 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 25
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This in an incredibly high quality product. Holosun has made a name for themselves in the bang for buck optic space, and this is a perfect example. Eye relief on magnifier is top notch, and adjustability is nice. Mechanism for flip to side magnifier works incredibly. Had it for over a year now and no worries about the battery. Easy QD mounting system makes it perfect for moving it from rifle to rifle as needed. Can completely recommend this.
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Reviewed in the United States on October 14, 2025 by Avery Smith
The HOLOSUN HS510C & 3X Magnifier Combo, featuring the HS510C red dot sight and the HM3X magnifier, is a game-changer for anyone in need of a versatile and highly effective optical solution. Here's why it unquestionably earns a perfect 5-star rating: Crystal-Clear Optics: The HS510C red dot sight provides a clear and crisp view, with a wide field of vision. The optical quality is outstanding, ensuring you can acquire targets quickly and accurately. Reticle Options: The sight offers various reticle options, allowing you to choose the one that suits your shooting style and preferences, whether it's a dot, circle, or both. The multiple brightness settings make it usable in various lighting conditions. 3X Magnifier: The included HM3X magnifier is a fantastic addition. It allows you to zoom in on your target for greater accuracy, making it an excellent choice for both short-range and long-range shooting. Flip-to-Side Design: The magnifier features a flip-to-side design, which means you can quickly move it out of the way when you don't need the extra magnification, and flip it into place when you do. Durable Construction: Both the red dot sight and the magnifier are built to withstand the rigors of shooting and outdoor use. They're robust and durable, designed for heavy-duty performance. Versatile Use: Whether you're into competitive shooting, tactical applications, or simply want to enhance your target acquisition, this combo is versatile and suitable for various scenarios. Quick and Easy Installation: The combo is straightforward to install and set up on your firearm, allowing you to start using it with minimal hassle. Value for Money: Considering the quality of the optics, the magnification options, and the versatility this combo provides, it offers excellent value for the price. In summary, the HOLOSUN HS510C & 3X Magnifier Combo is a 5-star optical marvel that excels in providing clear, versatile, and highly effective optics for your shooting needs. Whether you're a professional shooter, competitive sportsman, or someone who enjoys the precision of target practice, this combo is a reliable and valuable addition to your firearms setup.
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Reviewed in the United States on October 19, 2023 by AAM
Is very well made. A great addition to my girlfriend’s ar build I just did. Took to range and was easy to sight in. They are expensive but if you want quality you haft to pay. Thinking about getting another.
Reviewed in the United States on October 24, 2025 by nicole r.
These are awesome! The perfect combination, super clear, glass and accuracy, highly recommend.
Reviewed in the United States on September 11, 2025 by Seth R. Eisman
Easy to mount and get “zeroed”. Was able to dial it in with ease and all the tools to do so are included. All the screws were perfect and fit with ease. The optic is very clear with varying brightness levels. Magnifier is very clear and secure when you move it on and off the optic. If you’re looking for a value optic for casual shooting without sacrificing quality, don’t hesitate!
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Reviewed in the United States on March 9, 2025 by cody
I just received this item. Looks brand new, minimal wear on the pivot joint for the magnifier. Easy installation with toggle levers. 2 tools provided to adjust tension so you can adjust the toggle levers to fit tight and still be able to open it. Once adjusted, it fits tight with no wobble. Adjustable brightness is great for various lighting conditions. Magnification looks clear, and I like the provided elastic cover. From use with previous dot sights (5 moa) I thought I had an astigmatism. Maybe I do, but if so, this sight minimizes the starburst effect and would be completely usable. Will update after use.
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Reviewed in the United States on November 11, 2024 by Austin Austin
Verified shipping—got here quick. The product looks amazing and works even better. I have it mounted on my LC Carbine .45, and it fits perfectly. Easy to install, comes in a nice case, and feels very solid. I definitely recommend this to everyone—it’s a very nice addition to any setup.
Reviewed in the United States on August 25, 2025 by Alejo Garcia
This is a great product. The only thing I wish is that it came with better information about how to get it back to zero if it gets moved away from zero. Experts can figure it out easily, but novices can’t. And not everyone buying this will know how to do it. What I love about this is the ease of installation, the build quality and the weight. I’ve moved to a scope, but this will sit on the diving board and later at a 45 degree angle. This is great for rapid engagement and the quality of this product easily holds on my rifle
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Reviewed in the United States on June 15, 2025 by Amazon Customer