In this article, I will compare two red dot sights - the Holosun 507C vs Holosun 507K. I will share my thoughts on what I liked and didn't like about them when I used them at the shooting range and for concealed carry in regular situations.
To see how tough they are, I dropped them, I racked the lens on hard surfaces, and I put them in some mud. Some of the test results were expected, while others were not. I hope my comparison will help you decide which red dot sight is best for you.
The Holosun 507K is designed for subcompact handguns featuring the RMSc mounting footprint. The Holosun 507C is a full size micro red dot sight that features the RMR footprint for full size handguns.
Both red dot sights offer up to 50,000 hours of battery life and Holosun's multi reticle system as well as the ACSS vulcan (Sold separately). In addition, the Holosun 507K features a small notch rear sight cut out for co-witness that the 507C doesn't have.
|Specs||Holosun 507C X2||Holosun 507K|
|Material||7075 T6 aluminum||7075 T6 housing+Anodized|
|Reticle||2 MOA dot size+32 MOA Ring||2 MOA+32 MOA Ring|
|Battery||CR1632, Side loading||CR1632, Side loading|
|Construction||7075 T6 housing+Anodized||7075 T6 housing+Anodized|
|Battery Life||50,000 hours||50,000 hours|
|Body Dimension||1.78" X 1.15" X 1.15"||1.6" X 0.98" X 0.95"|
|Brightness Setting||10 DL&2 NV||10 DL&2 NV (Features Lockout Mode)|
|Adjustment||1 MOA/Click||1 MOA/Click|
|Weight||1.5 oz||1 oz|
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Holosun 507C VS 507K Footprint
The Holosun 507C has been designed for full-sized pistols and features the RMR footprint, while the 507K has been designed for subcompact pistols and features the RMSc footprint.
Their main differences lie in their optic sizes and field of view sizes.
507C VS 507K Field Of View
507C definitely has a bigger lens window than the 507K. As far as quickly finding the dot, it has to do with how much practice you have and your handgun grip angle that puts the line of sight closer to your eye.
If your main goal is to find an optic that allows you to quickly acquire and re-acquire the dot after each shot, please check out below the ACSS vulcan reticle that both optics offer.
Both optics feature Holosun's signature multiple reticle system, which features:
- 2 MOA center dot only - For precise aiming without a cluttered field of view
- 32 MOA ring only - For fast target acquisition up close and for shooters with astigmatism
- Combined - Nice to have for PCC use, but nothing to dislike either
Another option that is my favorite is the ACSS Vulcan reticle, which features a large outer 250 MOA ring to help guide the shooter's eye back to the center when shooting handguns. Both Holosun 507C X2 and Holosun 507K X2 offer ACSS models.
Holosun 507C and 507K Deals [Updated Daily]
Both Holosun 507K X2 and Holosun 507C X2 are not full weatherproof. Under normal use, these optics are phenomenal, and there is nothing to complain about.
Under rainy or sandy conditions, these optics continue to work, but as soon as water droplet gets on the inside part of the glass, then it's very difficult to wipe it clean without leaving some type of finger smear.
When accidently drop the optic into the mud or wet snow, it can completely block the LED emitter, and you need a tool and a Q tip to clean the optic out.
Both optics use a single CR1632 battery to run the optic, and they both last over 50K hours. So far I have not changed the battery at all, and it has not been an urgent concern.
The Holosun 507C X2 has changed the bottom battery loading design to side tray design, so the user can easily replace the battery without sight removal or re-zeroing.
The 507C X2 model is equipped with a solar panel positioned on its top, while the 507K model lacks this feature. From my perspective, having a solar panel is a convenient addition, but it's not frequently utilized since it solely functions under ambient light conditions and necessitates pressing a button if the red dot suddenly shuts off.
In addition, both optics feature the Holosun's ShakeAwake motion sensor technology to basically turn off the optic if they are sitting still, and it reactivates the reticle upon any movement.
Even though this is a good design, but it's almost pointless for conceal carry use because it's on a person that's moving around all the time.
Is The Holosun 507C Discountinued ?
The older 507C V2 has been discontinued, and the new model is the Holosun 507C X2. It has been redesigned to feature side loading battery tray, a new body finish, and it has smaller adjustment buttons.
- The 507C is for full size pistol use
- The 507K is for sub compact pistol use
- The 507K has rear notch cutout for front sight co-witness if the dot disappears.
- Both red dot sights are open emitter optics that are prone to attract dirt and they are not weatherproof. However, under non rainy conditions, they are great
- Side loading battery is convenient for battery swap without sight removal
As the content creator of badassoptic.com, My background in the firearms industry and shooting sports gives me the experience to recommend tried and true products and keep away subpar ones.