Use Millers in common use
A previous post lists many guns that hold more than seven rounds that are lever action. Even a 22 revolver is/will now be banned. These are all guns that have been around for quite some time (1800's). In common use from miller and heller seem to be the strongest way to fight this nonsense.
I'm not convinced the judges will find the registration unconstitutional. Common use has been held up most recently and is stronger argument to me.