This one was easy. Libertarians are always in favor of individual rights, in this case the right of self-defense and the defense of others. Given that libertarians are against aggressive force, they support the use of defensive force as a way to stop aggressors. No one should have to ask permission to defend themselves or own whatever they feel is necessary to defend themselves. That includes felons who should have their gun rights restored.
You can see my answers to the questionnaire from the New Hampshire Firearms Coalition here.