Most of the people who wrote the Constitution owned slaves.
Most?
The British told slaves that they would be given their freedom if they ran away and sought refuge behind the British lines.
The revolutinaries considered this to be a most despicable act. It turned out to be very despicable, because when the British were blockaded between the French Navy at Yorktown and Washington's Army, and were running out of provisions, they expelled the Blacks that had come to them for refuge.
I didn''t know about this , Oh those British, ....
But according to you, Jefferson, Madison, Monroe did not even THINK about slavery when the wrote the Constitution.
Jefferson ? Wasn't he in France at this time? Madison and Monroe were the sort to give a slave some acreage , even if they had to make the acreage in Africa.
Nary a thought passed by their minds.
It is my impression that Slavery was one of the hot topics with about half of the congress wanting more of it and half wanting less of it, Compromises were made , some of which set us up to nearly fall apart seventy years later.
Of course, the Federal government in 1789 was far to weak to take away anyone's guns. The British tried to disarm the people, but were not very successful. But they did make a lot of rural people very angry.
I think they made to people of Boston very angry too. One of the clues we have as to how the colonies were armed is the inventory the British kept of what they confiscated in Boston. There was a wide variety of small arms, which is a disadvantage when you are trying to fight and keep the guns fed.
I expect that since this was originally a band of revolutionaries they were very likely agreed on the value of guns in public hands. As plainly stated by many of them they were worried that the government would become corrupted and need to be corrected by another revolution.
There was some experience with slave rebellion and escape, and perhaps this was considered , but if it were considered an important feature of the constitution and the right to have weapons, why not denote it specifically? Slavery itself was mentioned and set in new limits, I would suppose that the use of force on slaves was assumed , and is one of the things that the half of them against slavery were specifically offended by.
A list of North American Slave rebellions.
https://en.wikipedia.org/wiki/San_Miguel_de_Gualdape