6 • Zips, Pipes, and Pens A German MP4 4 with several modifications, including the case deflector. (Courtesy of Fred Rexer.JrJ One of ‘ Carbine ' Williams' first homemade rifles, produced with milling machine or lathe from salvaged parts and an old piece of log. (Courtesy of J. David TrubyJ ere of the Bill of Rights is a good offense. Let's fight them in the legislatures, the Congress and in the statehouses and the White House. Let's fight for our rights. But let's also show them that from a technological and psychological standpoint, gun control doesn't work for free people anywhere, anytime. For these reasons, the production of improvised firearms must be part of the curriculum in every free person's study of combat arms training. Personal knowledge and experience in building and operating improvised firearms builds not only a strong confidence in oneself, but also in the potential of these weapons as tools for continued life and freedom in our never-ending war against tyranny. While small arms technology has come a long way since the first book in this series was published, improvised/modified firearms remain relatively uncomplicated and basic (e.g., a fully automatic weapon is far easier to design and build than a semiautomatic one). Today, all of the improvised /modified designs remain well within the accomplishment of the mechanically unskilled citizen who does not have access to firearms through other means.