Seems like majority of shotguns get prohibited as well.
From what I have read, technically you are correct (just), but I very much doubt that was the intent.
This wasn't mentioned by the Government gun grabbers but rather a private pro gun entity so I read it as unintended mistake on the part of the Turd Reich.
I doubt they want all the innocent shotgunners (most people imagine some hunter type with a double barrel chasing ducks or something along those lines - not 3 gunners) baying for their blood too, their approach is to divide and conquer in small manageable chunks and this feels like something they wouldn't want as there already enough pissed off people out there.
This is what happens when you have non gun people crafting gun laws.
I may be wrong but thats my gut.