The primary responsibility for defense against violent attacks is a personal responsibility. The defense of one's life and one's family is chiefly an individual responsibility, not a community or governmental responsibility. There is certainly a need to love our neighbor and come to his defense if we can. This, of course, means that he must be armed to meet all possible threats to his life. Today, this requires a citizen to be armed with guns.
Any weapon is permissible for use in self-defense.
This case law does not say the owner is guilty if he uses a sword, but not guilty if he uses a club. The issue is not one of weapons, but the right of self-defense. God's law does not make an arbitrary distinction between acceptable and unacceptable weapons for self-defense. And there are no biblical laws restricting the access of citizens to weapons necessary for self-defense. Gun control is self-defense control.