My hope is the NRA realizes this so they are playing along with this bit of political theater for political gain down the road, knowing that it probably will not pass. The NRA did state that they are hoping for an ATF solution rather than a congressional one.
An outright ban, is impossible to enforce. People will just remove them, but probably not destroy them....They aren't serialized. Who knows who has what?
Plus they can be 3D printed easily.....
The only way to really regulate them is to treat them as yet another NFA item, like a machine gun, SBR, or suppressor, requiring a Form 1 to make and a Form 4 to sell.....
Which would force them to open the registry.
Which would likely force an amnesty......
At that point, want a M16? Buy a lower, fill out a Form 1 and pay your 200 tax...