Keep in mind that Class 3 includes suppressors and SBRs, which are not restricted by 1986
You still have to ask local & government permission for ‘em, pay $200 (more than some should be worth), be scrutinized (allowing for “fishing expeditions”), and wait considerable time. All this for things that at best are safety devices (hearing protection) and at worst equivalent to other legal things.
Oh, and even the slightest paperwork “violation” can get you in the slammer for 10 years and a $25,000 fine.
Nope, these are specifically listed as “transferable machine guns”. NOT all NFA classes combined.
I think the BATFE is up to their eyeballs in trouble.
Mike