Assumption not supported by the Constitution, law or various opinions of SCOTUS over the last 192 years. 192 years ago SCOTUS said that Art.I, § 8, cl. 16 represented the full complement of militia powers conferred upon Congress by the Constitution. The only mention of the 2nd Amendment was in Justice Story’s dissent where he said that the 2nd Amendment, “may not, perhaps, be thought to have any important bearing on this point” (the point being the line between federal and state powers over the militia).
As I said before, 2nd Amendment has never been inspected to inform or held to instruct on any aspect of militia powers, federal or state. The 2nd Amendment has, as SCOTUS said later, “no other effect than to restrict the powers of the national government” (Cruikshank & Presser).
The 2nd Amendment does not establish any rights.
The Constitution is a charter of conferred powers, powers the people first possessed and lent to government. All not conferred is retained by the people and that includes the individual citizen’s right to keep and bear arms, free of any conditioning or qualification. No power was ever granted to government to impact the personal arms of the private citizen so none exists.
The people retained all aspects of the right to arms; there was nothing for the government to ‘establish’ or ‘grant’ or ‘give’ or ‘give back’ to the citizen in a limited fashion via the 2nd Amendment because the government cannot establish, create, grant or give what it never had.
The Supreme Court has affirmed this principle multiple times over the last 135 years for the citizen’s right to keep and bear arms. Presser is typical:
[INDENT]“[T]he right of the people to keep and bear arms is not a right granted by the Constitution. Neither is it in any manner dependent upon that instrument for its existence”[/INDENT]
You could separate the clauses with the Pythagorean Theorem, it wouldn’t alter anything. You could amend the Constitution and remove the 2nd Amendment entirely and it would not have any impact on the right of the people to keep and bear arms because, again, the right to arms is not IN ANY MANNER dependent on the Constitution for its existence.
Usurpation.