Holosun HS510C Red Dot & HM3X Magnifier Combo

Manufactured by Holosun
Manufactured by Holosun
4 Reviews

In Stock

Standard orders will ship out 1 business day if ordered by 3:30 pm CST, Monday-Friday. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination.

For individual Officer, First Responder, and Military pricing please make sure you are logged in. Click here for details



Combining a red dot sight with a magnifier extends your effective range significantly. Get this perfect pair all at once and forego the headache of having to buy optic, magnifier, and correct riser heights. The HS510C Open Reflex Circle Dot Sight has an open frame for a wide sight picture. Always on, it is powered by solar cell under normal usage, and a back-up battery to supplement power requirements in low light conditions. The reticle can be switched between a 65 MOA circle with 2 MOA dot, or a 2 MOA dot only at the push of a button. Better yet, the same LED projects both reticles, so no re-zeroing is necessary.

  • Parallax free optical design, with unlimited eye relief
  • Minimized obstruction of vision with push button controls and a streamlined housing design
  • Switchable circle/dot and red dot reticles
  • Always on unless manually turned off
  • Internal battery tray design
  • Large 32 mm x 24 mm lens
  • Solar cell and high capacity battery provide dual power supplies
  • Shock resistant titanium alloy protective hood
  • Quick release mount
  • Adaptable to Picatinny and Weaver rails
  • CNC machined 6061-T6 aluminum housing

The Holosun HM3X Magnifier is a great affordable option for stretching the legs on your Holosun red dot sight. This 3X Red Dot Magnifier features an adjustable diopter ring to dial in your focus and the generous eye relief means you will be quick on target. Included with this 3X magnifier is a quick detach mount with a spacer allowing you to line up with absolute and lower 1/3rd red dot mounts. The durable aluminum housing is made to the same standards as their red dot sights, so you know it will last. The flip to side design is quick to use allowing you to seamlessly transition between 1x and 3x. Improve the capabilities of your red dot optic with the Holosun HM3X Magnifier.

  • Adjustable diopter dial
  • Aluminum housing with matte black finish
  • Flip to the side design
  • Compatible with absolute and lower 1/3 height optics
  • QD mount and spacer included
  • IP67 certified water and dust proof

Holosun Technologies is committed to creating innovative optic, laser/IR technologies for a broad range of shooting, hunting, law enforcement, and military needs. Using quality manufacturing standards, they provide military grade optics without the military grade price.
See More


Battery TypeCR2032 3V Lithium Coin
Brightness9 Settings
Click Value1/2 MOA
FinishHardcoat Anodized
MaterialAluminum - 6061-T6
Night Vision CompatibleNight Vision Compatible
Reticle65 MOA Circle 2 MOA Dot
Reticle ColorRed
SizeFull Size
Weight4.9 Oz.

Ratings & Reviews

4 reviews

  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews
  • 1 star
  • 0 reviews

Very nice combo

by -

This is a great set up if you don’t ever intend to shoot at particularly long distance, but you DO like to shoot medium distances with enhanced accuracy. I almost went with a 6x adjustable scope and I’m still honestly not sure if that would suit me better, but this is a nice set up and my third Holosun product. I have 507k on my 365 and a 507c Vulcan on my TX-22 competition.


by -

I am absolutely in love with this combo. I already had four of these red dots. So much easier to sight in with a magnifier. Since it comes on and off so easy I can swap the magnifier from gun to gun. I highly recommend!

Best bang for the buck


Coming from an EOTech-user background (military), when it came to equipping my own gear, I sought out those sights on the civilian market. Pricier than expected. And, the batteries didn't last long, or tended to fall apart inside the sight. So, opted to look around and try a few other options. Holosun had a product line with solar back-up, shake-awake technology, and 10K to 50K hour battery life. They were also touted to be tough, so I figured the investment might actually last. For the price, I don't think you can find better quality. Works great on AR and AK platforms. Coupled with the magnifier, this setup is all you should need on a sub-300 yard platform with enough rail space. The only thing I would recommend aside from this combo, is the 510C with green reticle. A good thing made even better.

Wonderful entry optic and magnifier

by -

Hard to beat a better combo for the price!
<br>The HS510c is a relatively robust optic option that feels vaguely similar to an eotech. I have it on an AK railed gas block and it works well. The reticle in this setup takes up almost all the glass. Accurate and light. It can be a little finicky to attach on some rails for some reason in my experience.
<br>The magnifier is also decent. I use it in conjunction with a different optic on an AR platform. The eye relief is tight at around 2.5 inches, outside of this the scope shadow can get intense. Otherwise works fairly well.