Yes, I own a Bullet Button equipped AR-15.
It was Legal until it wasn’t Legal.
I’m in MS now so I’ll be “converting” it back to stock.
I’m next door in AL. Most of my AR’s have had the BB removed but some of them with BB Convertible I just backed the screw out of. It’s fun going to the gun store and walking out with multiple guns the same day, isn’t it?