Holosun 507K X2 Review – Best Micro Red Dot

This is my write-up of the Holosun 507K X2 Review.

Micro red dots are more popular than ever, and many people are looking for a good red dot to purchase for the first time.

If you are new to pistol red dots or have been using them awhile, this Holosun 507K X2 review will help.

This post will cover all aspects of the Holosun 507K X2.

Holosun 507K Review – Best Micro Red Dot

Holosun has proven itself to be a worthy company. Their red dots are very affordable and reliable.

The Holosun 507K X2 is a smaller version of the Holosun 507C. Here is my Holosun 507C Review if you want to check out that optic.

Pistol red dots are now popular with concealed carry. A small mounting platform that works well with multiple sub-compact pistols is excellent for the Holosun 507K X2.

This light and durable red dot sight is perfect for concealed carry.

Holosun 507K-X2

• 2 MOA
• Red Dot (Green version is also available)
• 12 different brightness settings (2 are night vision compatible)
• CR1632 Battery Type – 50,000 hours of runtime
• Parallax-free & Unlimited Eye Relief
• Designed for CCW
• IP67 Waterproof

Check Price

Price Check: Optics Planet, Palmetto State Armory, Brownells, Primary Arms, Cabela’s, Bass Pro Shop, GunMag Warehouse, Amazon

Pros

• Clear and crisp red dot and glass
• Good battery life
• Easy battery access
• Rear sight integration
• Reliable
• Lightweight

Cons

• Learning curve for first-time pistol red dot users
• Small window

First Impressions

When I first got my hands on one of these I was immediately impressed. The construction feels rock solid and you can tell this is quality made by holding it.

I couldn’t believe how small this optic was and wondered how well I would be able to see the dot through the window.

What’s In the Box?

Here is everything you get in the box with the Holosun 507K X2:

• Holosun 507K X2
• Two screw sets
• Allen key
• Owners manual
• Cleaning cloth
• One CR1632 battery

Holosun 507K X2 Overview

Here is the quick info and technical details of the optic. This is for the standard red dot version.

There is also an ACSS reticle version as well.

Specs

Features

• MRS: Circle Dot; 2 MOA Dot; 32 MOA Circle
• Up to 50,000 Hours of Battery Life (Setting 6)
• 12 Brightness Setting: 10 DL & 2 NV Compatible
• Convenient Tray Battery Compartment
• Parallax-free & Unlimited Eye Relief
• Designed for CCW
• IP67 Waterproof

Holosun 507K-X2

• 2 MOA
• Red Dot (Green version is also available)
• 12 different brightness settings (2 are night vision compatible)
• CR1632 Battery Type – 50,000 hours of runtime
• Parallax-free & Unlimited Eye Relief
• Designed for CCW
• IP67 Waterproof

Check Price

Price Check: Optics Planet, Palmetto State Armory, Brownells, Primary Arms, Cabela’s, Bass Pro Shop, GunMag Warehouse, Amazon

Reticle

One of the stand-out features of the Holosun 507K X2 is the multiple reticle system.

This can be set to a single 2 MOA red dot, a 32 MOA circle, or both of the reticles combined. Similar to what you would normally see on an EOTech.

So if you like the EOTech reticle and are familiar with that system, you will love the Holosun 507K.

This reticle allows you to customize it for different scenarios.

If you are shooting close range you can use the circle reticle, if you want to take more precise shots or even at a distance, then the single dot comes in handy.

For the best of both worlds, use the combination reticle for speed and accuracy.

The brightness is satisfactory and I had no problem seeing the red dot even in direct sunlight.

Switching reticles is simple, all you do is hold down the – button for 3 seconds and this activates the reticle cycle mode. By pressing the button again you will be able to cycle through them.

Size

I’m amazed at how small modern pistol optics are getting and the Holosun 507K X2 is one of the smallest.

It isn’t too small where you can see through the window. I would say it’s just right, any smaller and it would be very difficult to use.

The window dimensions are 0.58″ x 0.77″.

You truly won’t believe how small this really is until you hold one in your hand or look through one mounted on a gun.

The dot is still found without searching, but the circle red dot is even quicker.

If you are brand new to pistol red dots, this will take some getting used to. With practice and experience, searching for the dot will become quicker and quicker.

Construction

Pistol red dots take extra abuse being that they are mounted on the slide. The contrast jolt every shot can take its toll on optics.

The Holosun 507K is very well-built.

It is made of 7075 aluminum and specifically designed for pistols, so the internal electronics are built with this in mind.

The glass is scratch-resistant and the housing is made to protect the glass and the LED emitter.

The battery storage compartment closes up tight with no movement or play.

Overall the construction is top notch and this is a very durable red dot that should last a long time.

Battery

The side battery access is what all pistol optics need to move to. The last thing you want to do is to remove the sight and lose your zero.

So good on Holosun for adding this feature.

Replacing the battery is simple with the right tools and Holosun includes the Allen Key in the box.

The 507K runs on a single CR1632 battery and is advertised as 50,000 hours. This will depend on conditions and storage. Also what brightness setting you leave it on.

Expect at least one year of real-world use and I recommend replacing the batteries of all your optics once a year regardless of battery life.

When testing I removed the battery several times to see if my zero would shift. No issues with this.

User Friendly

The mounting system is versatile. This optic uses the Shield RMS footprint allowing you to mount this to many popular pistols.

When drawing your gun in a self-defense situation, you most likely will not have time to turn on your red dot. This is where the “shake-awake” function is priceless.

Replacing the battery is simple and quick as I mentioned earlier.

The buttons are small but still accessible and easy to use with good feedback when pressing them.

This optic is intuitive and simple to use. For anyone looking for a red dot on a self-defense pistol, simple and reliable is key.

For the price, you get everything you would expect.

Holosun 507K-X2

• 2 MOA
• Red Dot (Green version is also available)
• 12 different brightness settings (2 are night vision compatible)
• CR1632 Battery Type – 50,000 hours of runtime
• Parallax-free & Unlimited Eye Relief
• Designed for CCW
• IP67 Waterproof

Check Price

Price Check: Optics Planet, Palmetto State Armory, Brownells, Primary Arms, Cabela’s, Bass Pro Shop, GunMag Warehouse, Amazon

Final Thoughts

The Holosun 507K X2 is one of my favorite micro red dot sights, especially for concealed carry because of its size and weight.

If you are thinking about getting one, I highly recommend it. It’s an incredible sight that is reliable and affordable.

What do you think about the Holosun 507K X2? Have you had any experience with one or used it as your everyday carry? Let me know in the comments below.

Holosun 507K X2 Review FAQ