Holosun HS510C

Holosun HS510C Open Reflex Sight

Holosun’s HS510C open reflex site comes equipped with a solar cell that will be able to power the sight under normal conditions. If you’re in a low light situation, there is a battery backup that will engage to ensure that your sight is ready when you need it most.

The best holographic sight on the market, the Holosun HS510C features the following dimensions:

  • 58-inch length
  • 41-inch central height

The HS510C offers a standard red dot, so it’s easy to get accustomed to if you’ve used an open reflex sight in the past.

Holosun HS510C Review

Best Reflex Sight That Won't Break The Bank HoloSun
© Holosun

One glance into the reticle and you’ll realize that this is the sharpest reflex on the market. Zero parallax, unlimited eye relief and ample brightness make it one of the most sought-after reflex sights on the market today.

LED is the light source, with a reticle that is 2MOA Dot and a 65MOA Ring. Magnification is 1x, and there are multi-coatings on the unit.

Holosun made this one of the most technologically advanced sights in existence, and it starts with the sight’s solar cell operation.

Powered Via Solar Cell With a Backup

A solar cell helps keep the open reflex sight operational. You don’t need to be in direct sunlight for the cell to power the unit, and you can put a battery in place as backup. If overcast is in the forecast or you’re out hunting in the early morning hours, the battery will kick in to power your sight.

The solar cell is very accommodating, and it’s so good that a lot of users will not put the battery in the scope.

Batteries will add very minimal weight, but for some users, they prefer even the slightest reduction in weight for their shooting preference. A CR2032 battery will last for up to 50,000 hours.

Auto-on Feature That Works Every Time

Holosun has incorporated an auto-on feature which requires you to pick up your firearm or shake it to start the sight. It’s a feature that a lot of sights do not incorporate into their design well.

But Holosun offers an auto-on feature that works every time.

You’ll also be able to enjoy the auto brightness feature, which will try and adjust the sight’s brightness for you. While auto brightness works well, it is the one feature that users do complain about.

Some users love the brightness level, while others wish it was about 10% bright.

In my opinion, the auto-on feature and the automatic brightness level mean that you can pick up your firearm and be ready to shoot with less delay. It’s these small features that make the Holosun stand out from the competition.

Auto-dimming is also a great feature to have and will make a noticeable difference when going into dark to bright areas.

If you want to disable the auto-dimming feature, all you need to do is hold in the button for three seconds and it will turn off.

Easy-to-see Reticle

The unit’s reticle is very easy to see, even when you point it towards the sun. When you’re in bright areas, you will not lose your dot – something cheaper models cannot guarantee.

When in close range, the 65moa is perfect, while the 2moa dot will be ideal for your far range shots.

The multiple option is another added bonus for the Holosun HS510C. A lot of sights in this price range only give you one option, so it adds greatly to the value of this sight.

The dot is co-witnessed.

Holds Zero in All Conditions

I haven’t personally put this sight through a battery of tests to see if it held zero, but I have read reviews from others that claim this sight can hold zero after:

  • Falling on the ground from 10+ feet
  • Beating on it
  • Pouring water on it

You can see a few YouTube videos where people decided to beat on the reflex sight for several minutes to see if it still held zero. It held up much better than expected, and held zero through several minutes of beating on it.

If that’s not reliable accuracy, I don’t know what is.

The large viewing window provides a crisp view and is amplified by the thinner profile. If you ever do need to take it off or swap it to a new firearm, there is a quick release option, which allows the unit to rapidly be changed out thanks to the latch keeper.

When you do install the Holosun, make sure that you tighten it as needed with the included tool. One turn is often all that’s needed to clamp down the HS510C securely in place.

If you’ve purchased this model and notice that the optic is very dim, try placing it under a lamp for about an hour. There have been some issues with this sight, particularly when it was in the box for a long period of time.

You’ll correct the issue by putting it under a lamp for an hour or so.

This is a great AR optic, and it’s probably the best value on the market today.

You’ll find the Holosun HS510C for sale on Amazon and other major retailers. And if you do have an issue, Holosun has some of the best customer service in the industry. One consumer had an issue on arrival, and the company shipped out their replacement optic within four hours of contact.

If you’re in the market for a reflex sight that allows for fast target acquisition, automatic brightness adjustment and comes on automatically with fail, the Holosun HS510C open reflex sight is what I recommend.


More Stories
NC Concealed Carry
North Carolina Concealed Carry Laws