Please define "arms" in terms of the 18th century American colonies; and in terms of say, 21st century US.
Interesting, no?
Webster: Arms........Weapons.
In the 18th century this would include canon, muskets, sabres, swords etc.
In the 21st centrury it would include, but be not limited to, all of the foregoing plus all of the biological and nuclear weapons. The courts set the laws limiting weapon type and use parameters dependant on danger to the population.....noise, radiation danger etc.
Therefore I would not likely be permitted to develope anthrax in my basement.
N'est Pas?