A ban on the purchasing of arms would definitely infringe on people's individual right to keep and bear them. Yes, an individual right, which is how 18th-19th century courts and political commentators viewed the 2nd before the 20th century "militia only" narrative.
https://en.wikipedia.org/wiki/Second_Amendment_to_the_United...
... then when it comes to guns... "Well, of course it includes _purchasing_ those arms, even if it doesn't explicitly and literally say so, because it'd be hard to bear them otherwise, so it somehow _must_ guarantee that, too!"
"Voting in elections is a civil right granted by the Bill of Rights. Access to a polling station isn't a civil right."
That's effectively what you're saying. Rights enshrine access. Things like poll taxes, voter ID, etc. have all been declared unconstitutional because they infringe upon your right. Banning purchasing arms falls in the exact same category.
The entire premise of individuals owning weapons is based on that "well-regulated militia", yet no such entities actually exist in 2022.
This is why DC vs Heller was decided in the way it was. The "well-regulated militia" before the comma meant something totally different than its current meaning.
As an aside, I think that most modern military weapons should be banned, but that is actually not what the 2nd amendment calls for. The right solution to the problem is to amend the constitution, not try to pass gun control laws and see what a court will approve.
If you ignore guns entirely, the US still stands out from other countries with an extraordinarily high rate of non-gun violence. It's more accurate to say that the US has a violence problem in general.
If you're truly interested in solving the violence problem, perhaps examine why the US is such a statistical outlier. And also, perhaps, why other countries like Switzerland have such different outcomes while still having extremely high rates of private gun ownership.
https://en.wikipedia.org/wiki/Firearms_regulation_in_Switzer...
https://en.wikipedia.org/wiki/Estimated_number_of_civilian_g...
Clearly, you and I both support the second amendment. However, we should recognize when our support of certain associate claims aren't well founded. Bearing arms and being part of a well-regulated militia are American civil rights granted by the Bill of Rights. Purchasing those arms isn't a civil right.[0]
[0] https://www.ojp.gov/ncjrs/virtual-library/abstracts/second-a...