Both the 507K and 407K fit the same slim-slide footprint. Here is how they differ.
| Spec | Holosun 507K | Holosun 407K |
|---|---|---|
| Footprint | Shield RMSc | Shield RMSc |
| Emitter | Open | Open |
| Reticle | 2 MOA dot / 32 MOA ring | 6 MOA dot |
| Typical price | ~$300 | ~$270 |
Do the Holosun 507K and Holosun 407K use the same footprint?
Yes — both use the Shield RMSc footprint. They mount on the same slide cuts and adapter plates, so switching from one to the other is a direct swap.
Full compatibility (every optic + pistol) for each footprint: Shield RMSc