OK
The mainbodies are a bit different between the following guns.
Automag, Minimag
RT
Emag, RT Pro
The difference between the bodies on the RT-Pro/Emag and the Automag and MiniMag are the pims that are on the bottom of the body.
The Automag and Minimag use a squarish pim where as the RT/RT Pro and Emag all use round pims.
RT mainbody Automag mainbody and Emag Mainbody
Now, while it's not a factory backed suggestion you COULD use an RT Pro or Emag body on an Automag/MiniMag. While you CAN'T use the Automag body on an RT Pro or Emag.
Meanwhile the Automag, MiniMag, Smartmag, MicroMag, ReTro valve, RT Pro, Emag valves are all "BASICALLY" interchangable.
-Robert