The 407C and 507C mount identically; the difference is the reticle and features. Here is the comparison.
| Spec | Holosun 407C | Holosun 507C |
|---|---|---|
| Footprint | Trijicon RMR | Trijicon RMR |
| Emitter | Open | Open |
| Reticle | 2 MOA dot | 2 MOA dot / 32 MOA ring |
| Typical price | ~$250 | ~$310 |
Do the Holosun 407C and Holosun 507C use the same footprint?
Yes — both use the Trijicon RMR 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: Trijicon RMR