I have been away for awhile, find the thread becoming more interesting. I like reading the experience of people; it puts the Church teaching and theory in a real world setting.
Jesus did not do away with the law; He fulfilled the law. That does not mean doing what people in the Old Testament did. It does mean taking the whole Gospel, not just certain verses, and trying to see what the Gospel tells about living life. A keyes to the ethic of the Gospel are the beatitudes. In my own experience of trying live out the ethic of the Beatitudes, which require sacrifice and a whole lot of counter culture action, I continue to wonder how taking the life of another, for whatever reason, fits into what the Gospel of Jesus Christ calls us to be.
To be perfect as the heavenly Father is perfect, seems to me to preclude the use of any kind of gun for protection or defense. A gun is not a sword, when you raise that to an automatic weapon, the weapon is far beyond any harm one person could ever do with a sword, so I think we should avoid the comparison of gun with sword.
When not living in a city, I stay in an area where many Amish people live. I have become friends with an Amish family, who have taught me a lot about being a disciple of Jesus Christ. Although I could never live as they do. without being connected to the power grid, using horses for transportation and to farm, to educate their children only to the eighth grade. They have much to teach me about living the Gospel ethic. They do not and have not used any kind of weapons to defend themselves against the attacks of their enemies, in fact, they give witness to the tremendous power of forgiveness when someone does one of their members harm.
To live the ethic of the Gospel requires a lot more than most of us are willing to sacrifice, that includes myself. However, I believe that if those of us who call ourselves disciples of Jesus Christ were to live out the Gospel ethic we would be living in a different kind of world. I believe that world would reflect more the will of God then our world today does.