A large fraction of the harm from firearms comes from their ability to fire rapidly which didn’t exist when the constitution was written. As such it was making a very different balance of risk between the general public and individuals.
2. As someone else pointed out, early repeating rifles did exist then.
3. If the meaning of the constitution is only to be evaluated against the technology available at the time -- what does that say about the validity of the 1st or 4th amendments with modern technology?
But again, in historical context, the point of the 2A was to permit people to own the most deadly weapons of war that existed at that time.
Very obviously individuals were expected to be part of the militia, which was the military at the time (c.f. the Militia Acts 2 years after ratification requiring individual gun ownership and very clearly laying out that all able-bodied white male citizens aged 18-45 were part of the militia), but also states could regulate weapons if they wanted.
Not a firearm.
I didn’t say we could ban compressed air powered guns, I specifically said percussion caps. The Girardoni was way less dangerous than a modern handgun.
In the 230 intervening years, we've vastly increased the scope of the federal government and developed a formal military, so one might argue we ought to amend the constitution to change exactly what's allowed under 2A (e.g. it should be straightforward to have a nuclear weapons ban added with unanimous agreement), but as it stands, 2A (+14A) clearly gives individuals the right to own the arms necessary to run a functioning ("well-regulated") militia, which in 2026 means at least semi-automatic firearms.
The right to a jury trial is another example of favoring the individual instead of say, the Star Chamber: https://en.wikipedia.org/wiki/Star_Chamber
I don’t think we even disagree per se, but it’s hard to argue the constitution wasn’t written primarily with the thought of what England and how it exercised authority in mind. Individual roadmen and ruffians, let’s say, existed but weren’t existential threats to shape the tone of the new nation’s foundation, were they?