Featureless for me. As I read the law, if you register you cannot make any changes to the weapon after that. So no changing the upper etc.. I also interpret that the registered AW needs to have a bullet button installed and you will have to apply to DOJ to have it un-registered if you wish to later and likely pay another fee etc. They will also not register a stripped lower, so if your sitting on a few, they will have to be complete rifles for registration.