According to the 2nd, it would be an infringement. However, one can refuse to sell to a seven year old because of contract law.maineman » 22 Feb 2023, 8:57 am » wrote: ↑ "the right of the people to keep and bear Arms, shall not be infringed."
How is preventing seven year olds from purchasing an AR-15 NOT an infringement on the rights of the people?