shockwave??

I know they've been okayed by our fine friends at ATF but I wonder why?  A shotgun is defined as a smoothbore designed to be fired from the shoulder, so that takes the shockwave out of that category. A 14"bbl is less than the legal length of either a shotgun or a rifle.  I know they've been put into another class called firearm but I haven't found a definition on ATF websites that covers it, yet.  The oal is 27" so it meets that requirement.
Im thinking that at some point ATF will go after purchasers like the did with forced reset triggers, solvent traps, etc. when they change the rules. What do you all think?
I don't really want one, but I think often about "hidden in plain sight". Imagine a fiberglass trophy fish hanging on the wall with something like that inside, preferably with clearance for the trigger so the first round could be fired from inside the trophy.  Of course, that would put it into the same category as a wallet holster capable of being fired in the holster.

When they first came out I was in constant contact with the ATF guys about the legality and their hands were tied by NFA 34 in that the definitions were written into law and the Shockwave slid right between the cracks in the law. We sold the piss out of them for about the first year and then they calmed down significantly. In that first year, I couldn't keep them in stock and stores were clamoring for them. I got a load of them and put a few dozen in each store and they were screaming that was too many. But I put them in an ad and moved through them in a weekend and created about a million complaint phone calls to the owner.

There is a lot of room for loopholes in the laws as written. Pistol braces, integrally suppressed muzzle loading rifles, bump stocks, binary triggers, forced reset triggers. Sure, they could write new laws and outlaw them, but they can't put the toothpaste back in the tube,