On what mount can you install Holosun 507K X2? And with which optics can you share the same mount? In this article we look in detail into the Holosun K-series mounting standard.
What footprint is the Holosun 507K X2?
Holosun 507K X2 red dot uses the unique Holosun K-series red dot footprint standard.
You can see more red dots compatible with Holosun K-series footprint in this article.
Holosun 507K X2 pattern
The K-series pattern consists of two sockets in the front corners of the front of the sight and of two screw holes in the rear of the sight.
The front socketes are 17mm / 0.66 inches far from each other. Position of these two sockets corresponds to position of pins that are on a mounting surface of any mount for this standard.
The screw holes are positioned in the rear part of the optic device. These function for fixation of the sight to the mounts. These two screw holes are 14mm / 0.55 inches far from each other.
The screws that are to be used for these screw holes are always included in the package with the sight.
Modification of Shield RMSc footprint
The K-series footprint standard is basically a variation of the Shield RMS footprint standard. Compared to Shield RMS, the K-series pattern uses two less sockets – it does not have the sockets in the back of the optic. And also the front sockets are more shallow and thus the pins on the mount have to be shortened.
Instead of getting mount directly for Holosun K-series footprint standard, you could also modify the Shield RMSc standard. But it can be a tricky operation. It can easily happen that during the modification the mount is damaged so that it no longer fits the rear sight dovetail cut, and thus cannot be used. Once modified, you also lose warranty from the seller.
Other optics sharing the same footprint
Other than Holosun 507K X2, this footprint is also used for other red dots. You can use the same mounting profile also for following optics:
- Holosun 407K X2
- Holosun 507K
- Holosun EPS
- Holosun EPS Carry
- … and other, as per the actualized list here
Other red dot footprint standards
Holosun 507K X2 uses the unique Holosun K-series footprint standard. That is not the only standard on the market. Below you can find other popular mounting standards: