Since the current majority of USSC likes Originalism, I can argue against

[Igel]

8. The revolutionary war ended a few years before the Constitution was written.

Note that the lack of an active war means there's no need to be prepared for self-defense, either individual or collective.

The 2A tells the government not to prohibit weapons and infringe on that particular right since states properly have individual militias and those need to be kept up to the required standard. Not that it was the federal government's responsibility to ensure those standards were met.

The idea of self defense existed before the original confederation and was infringed upon by the King. Common-law self-defense goes back before the colonies were founded and British slavery in North America a thing.