And on a corollary, if for some reason it was declared a DD, would it already being an short-barreled-shotgun preempt having to register it as a DD?
This question came up in a previous theoretical Saiga ban thread, but it never got an answer.
There were SBS-ed USAS-12's and Streetsweepers when they were declared DD's, so it seems there should be an answer.
I'm curious, though, if it actually matters. Are there any states that allow SBS's but not DD's?