The only magnified red dot I have tried was using an Aimpoint PRO and a gutted Hensoldt rocket sight (assuming 1" or 26mm tube?) and it was not close to the brightness level of my Steiner P4XI.

Is that just due to the smaller tube diameter of the Hensoldt and/or combining the 2 optics? Or is the brightness on any of the purpose built 3x magnifiers getting in to the same ballpark as the Steiner P4XI?