In this category, it is listed whether the mount is attached to the optical device with rings or via rail. In the red dot sight adapters section, it is written which red dot sight the adapter is made for.

If the mount is attached to the optical device with rings, the ring diameter is listed:

Ring diameter

If the mount is attached to the optical device with rail, the rail type is listed:

Rail types

In the red dot sight adapters section, it is written which red dot sight the adapter is for: