Gentlemen, it has been over a week and Mauser have not replied, probably some trade secret bullshit even though as soon as they come into circulation one could find out anyway. However, I have spoken to
John Mialls (Gunsmith and Mauser Australia agent) who has been to the plant in Germany and confirmed that they are definitely threaded, although he could not tell me what thread. It will be interesting to see if they will also sell just actions at a later date.

Waidmannsheil.