The right to keep and bear arms is generally held to be talking about things like guns. In fairness, those are the things most people are trying to ban and the things best suited for self-defense.
However, while on a livestream that was also going out over the radio, one of the listeners asked if I thought arms meant just firearms. No, I replied, it didn’t. The phrase “arms” includes pretty much any weapon, and in the time of the Founding Fathers, that included swords.
Most people don’t own them or know how to use them, but they’re just as covered by the Second Amendment as firearms.