Thank you
I had pictures of an airsoft conversion as my reference plus the pictures of the MIM version.
I started by drawing the side view of the thompson and cut out four or five layers and glued them together. Then I cut some wich differed to get the right shape at the back end (i don´t know the right names for the different parts).
I continued with the spas cage and pump handle, then I made the main barrel ( from a paper spool) and that grill thing around it. I did the shroud last.
Not much help I supose