Where would that be sold exactly ??
I own a goodern!
My son bought the upper for $300 from some anonymous guy at a gun show. He’d sold a pistol of mine for $800 to some other guy, and called me and I approved the purchase.
Mine is a 20” Red Star 1” diameter stainless 5.56 NATO chamber. The upper is an uncontrolled gun part.
I’m a law abiding sort, so I filled out a 4473 for the $60 lower receiver at an FFL dealer, and then of course I had to have the combat tested T handle and two ten round and one thirty round magazine and a trigger kit and another parts kit and my friend put it together and it was over $600.
A brand new one ready to go is $600 now.
You have $600 left over for ammo and sights and toys for your AR, before you equal a $1,200 iPhone.
In Missouri and many other states I can sell my AR and all accessories complete, legally face to face with a adult over 18,
There maybe 25 million ARs in the USA.
None are registered.
It is impossible to take them away, even if it was constitutional which it is not.