"I think you are correct about the sten and suomi though."
Really ?
Ok, how about this.
I own a full auto Sten.
On the form 4 I filed with the ATF, box 15 states " I ___________________, have a reasonable necessity to possess the machinegun, short-barreled rifle, short barreled shotgun, or destructive device described on this application for the following reason _______________________________
I filled in that second blank with the words: "For Sporting Purposes".
The form 4 was approved and signed by an examiner, approved and signed by the supervisor, stamped, and returned to me.
Now explain to me why a Sten doesn't count.
Furthermore, I am currently having my Sten rebuilt into a Sterling using my registered tube and a Sterling parts kit including the parts kit barrel. The tax stamp still says "For Sporting Purposes", as it should since sporting purposes are exactly what I use my guns for.