The last I heard, the phrase “keep and bear” meant precisely “keep and bear” and not something else tyrannical politicians make up to more easily control their subjects.
Regardless of the legal niceties, people should make preparations to go underground if necessary, whether in the manufacture, storage or repair of arms. They may cause things to happen to “extremist” SCOTUS, POTUS, legislators and state and local government officials who stand in the way of their agenda. An infrastructure must be in place already should that ever occur, and not just with arms, but also with food, automobiles, gasoline, barter trade, information, communications, whatever is needed to live independent of a dictatorship that has a hold of all the lawful, official means.