That’s an NFA firearm. Those are already niche items, not something you see every day.
The article makes it sound like there are millions of these out there in private hands just begging for an ATF raid.
Having an NFA weapon is perfectly legal in most states. Having it re-classified as AOW or destructive device presents a whole new set of problems for the owner. As owners, we have submitted to FBI, local law enforcement as well as Treasury. The last thing we need is one more hoop to jump through. It’s bad enough that I have to worry about a non-NFA weapon slam firing and being deemed to be a machine gun, or owning a semi-auto AR and some AFT flunkie deeming my kids air soft rifle parts to be interchangeable and thus sending me to the slammer if he thinks it will further his career. We don’t need any more bullshit.