Hi, I found this deactivated (sorry but no other way to have here) 1928 A1 Auto-Ordnance number AO 73617. The lower body is clearly from an other SMG. Under butt stock there is number : S 527656, and added 73617 + 31480 or 3/480 i would like to know if it is gun with an interesting history to keep, i mean a significant WWII modification. or if no interest. thanks http://i257.photobucket.com/albums/hh209/paulsavoy/Divers%20Forum/AO73617_zpse71f44b6.png