Interesting listen on National Review about how knives fit into 2A, since “arms” doesn’t only comprise things that go bang:
https://www.nationalreview.com/2020/09/if-you-care-about-guns-you-should-care-about-knives-too/
https://www.nationalreview.com/2020/09/if-you-care-about-guns-you-should-care-about-knives-too/