HOLOSUN HS510C & HM3X Combo Multi-Reticle Circle Dot Open Reflex Sight w/3x Flip-to-Side Magnifier 510C-HM3X
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Availability:
In Stock.
Arrives
Tuesday, Feb 3
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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
Product Warranty: For warranty information about this product, please click here
Best Sellers Rank: #11,188 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #37 in Gun Sights
#37 in Gun Sights:
Customer Reviews: 4.8 4.8 out of 5 stars (987)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Feb 3
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
I love this setup. Easy to install and use. Eye relief is nice along with the field of view. Definitely worth the money.
Reviewed in the United States on December 12, 2025 by Richard J.
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
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
Fit great on my AR-15 , very easy to install and works great out at the outdoor range, even in very bright sunlight.
Reviewed in the United States on December 4, 2025 by Chris
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.
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’m excited to go to the range
Reviewed in the United States on January 10, 2026 by Joseph Mather Jr
I put this pair on my newest AR pistol build. I loved it so much I just sent this same pair to my son for Christmas. The 3x magnification is better than you'd imagine only 3x to be, and it's crystal clear. If the target is up close to you, it can easily be pushed out of the way and you're just looking through the sight, which is awesome. This will not help you much at 500 yards, but is amazing for 200 yards and in, and especially 75 yards and in, like pig hunting.
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Reviewed in the United States on December 13, 2025 by Michael B