You mentioned door to door, not me. One plan is to use the courts, make ownership illegal, give people an opportunity to turn in the illegal guns. After that ownership of illegal guns or magazines will make you a criminal. There will be no door to door. There will be consequences if you are caught being in possession, buying or selling those items. Your offense will be dealt with similarly to owning or possessing illegal drugs. And it will be equally ineffective, except for creating a new criminal class. You can have the last word...