In the narrative Heinlein laid out a system for assuring that the citizens, the political authority of the Terran Federation, actually knew what they were doing and the reason for the procedures followed. This was because authority in any field of human endeavor is founded on knowledge of that field. Thus political authority is founded on political knowledge.
In the following image released by a hoplophobe group established by former New York mayor Michael Bloomberg they demonstrate their knowledge and thus authority to speak on the subject of firearms:
As they clearly demonstrate they have no functional knowledge of firearms and thus no authority to speak on the subject at all.
The fact is that the personal weapon is the fundamental instrument of political authority, to disarm the citizen is to render him politically irrelevant. Thus is a free nation the attempt to disarm the citizens is in practical effect an act of treason, and as such is properly punished by the penalty of death.
What are your questions?