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  • Post last modified:December 21, 2023
In this Holosun 407K VS 507K comparison guide, I want to cover the major differences that actually matter to serious red dot sight users. These are similar optics but they offer different reticle options. 

The Holosun 407K is about $100 cheaper than the 507K. Here are my insights on their main differences after using both of them.

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Holosun 407K VS 507K - Main Differences

holosun 507k x2 on p365 xl pov

After using both the Holosun 507K X2 and 407K X2, I've noticed a few key differences besides their physical similarities. The 507K features the Multi Reticle System (M.R.S.), offering versatility with multiple reticle options, while the 407K comes with a singular 6 MOA dot, which is straightforward and effective for quick targeting. 

In terms of cost, I found that the 507K is priced higher, which makes sense considering its additional features. Battery life is another aspect where they differ. The Holosun 407K features an impressive 50,000 hours of battery life, a feature that gives me peace of mind during extended use. The 507K, when using the Multi Reticle System reticle, offers a shorter battery life of 20,000 hours, but it's worth noting that switching to just the 2 MOA dot on the 507K extends its battery life to match the 407K's 50,000 hours.

This flexibility in the 507K is something I appreciate, as it allows me to tailor the sight to my specific needs and preferences. However, if you just want a clean center dot reticle, the 407K is a good enough option.

Here are their specs in bullet point format:

Holosun 507K Specs

Magnification: 1X

Reticle: 2 MOA dot, 32 MOA ring, or combined

Turret Value: 1 MOA / click

Window Size: 0.58" X 0.77"

Construction: 7075 T6 aluminum IP67 rated

Dimension: 1.6" X 0.98" X 0.95"

Weight: 1 oz

Battery Life: CR1632, 50K hours

Brightness Settings: 10 daylight, 2 night vision

Holosun 407K Specs

Magnification: 1X

Reticle: 6 MOA dot

Turret Value: 1 MOA / click

Window Size: 0.58" X 0.77"

Construction: 7075 T6 aluminum IP67 rated

Dimension: 1.6" X 0.98" X 0.95"

Weight: 1 oz

Battery Life: CR1632, 50K hours

Brightness Settings: 10 daylight, 2 night vision

Holosun 407K VS 507K Battery Life

holosun507 k x2 unboxing inside

The main difference between Holosun 507K and 407K is the reticle options and price difference. Ultimately, they have the same Grade 5 Titanium body (2X tensile strength and as high as 5X the fatigue strength of 7075 Aluminum)

The same body specs, the same window size, the same 50000 hours battery life, and the same RMSc mounting footprint.

The battery can be access through the side door tray, and no optic removal is required for swapping the battery.

holosun 507k dealing with melting snow

However, if you are not careful. Both optics are open emitter red dot sights and water and moisture can get inside and block the emitter screen. If you accidently get ice and frost inside, it will be very difficult to clean it. The sight will literally become unusable.

Holosun 407K VS 507K Optic Deck Height

The 407K X2 and 507K X2 have identical deck heights, so they block your iron sights equally. Neither model offers better visibility of your iron sights than the other.

Holosun 407K VS 507K Reticles

The biggest attraction for the Holosun 407K is the 6 MOA dot, which is honestly the best option for users with astigmatism. The 6 MOA offers a much crispier dot reticle, which appears rounder with less emitter glare if the brightness is dialed up.

In addition, the HS407K X2 enhances the prior model by incorporating Lock Mode, initially featured in our 2018 LEM pistol optic models. Once engaged, Lock Mode secures the buttons, thus preventing unintentional adjustments to the settings.

6 MOA outdoor sunny day

The Holosun 507K comes with the multi reticle options:

  • 2 MOA only
  • 32 MOA ring only
  • Combined

Based on my personal experience, the multi reticle feature is a nice to have that comes with the Holosun 507K, but it doesn't significantly change the way a person shoot.

The 2 MOA dot is a standard size dot that most red dot sights like Aimpoint Micro, and it doesn't clutter up the field of view, and lately I have really been a fan of the single dot than the one with the 32 MOA ring around it.

Precise Without Being Too Small - The 2 MOA dot is much more precise and easier to pick up without being too small like the 1 MOA dot.

More feedback - The dot appears to be more "wiggly" due to its smaller size, which helps the shooter become more aware of their movements and potentially improve their shooting technique.

Versatility: A 2 MOA dot can be suitable for a wider range of shooting applications, from close-quarters combat to longer-range target engagement. Its smaller size and increased precision make it a versatile choice for various shooting scenarios.

Check out more: Holosun 507K X2 full review

holosun acss long range shot low light

The new 507K ACSS reticle actually provides a chevron finite tip reticle that clutters less the FOV, and the outer ring helps the shooter to find the reticle center faster.

Experiences With The Subcompact Pistols

holosun 507k on p365 XL

After using both optics on and off for about 2 years. I have tested both on Glock 43X MOS, Springfield Hellcat and Sig P365XL.

Both optics still have noticeable lens distortion. It's like a slight 1.1X zoom. But for shooting targets up close it's not a big deal.

The 6 MOA dot is still my favorite because it's simple to operate, and it works well for astigmatic eyes. When using the 6 MOA model, I don't have to remember button pressing combo to change the setting. All I had to do is press and hold "+" button to lock and unlock the setting.

The 507K's 32 MOA ring is great for close up target acquisition, but the reticle gets too cluttered when aiming for something further away. I often find myself dial back to the 2 MOA single dot, or forgot how to change the settings on the 507K without a manual.

(Remember: Press "-" for 3 seconds to switch) 

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