Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Vulcan M-11-9 is a semi-automatic, closed bolt pistol manufactured by Vulcan Armament.The M-11-9 is a knockoff of the Ingram M-11 series which is an open bolt, fully-automatic machine pistol. While the Ingram uses proprietary magazines, the Vulcan used readily available surplus 32 round sten magazines. Utilizing the 9mm Luger cartridge, it is a civilian legal version of the military weapon. The pistol has had a somewhat rocky start with severe quality control issues on early production guns. Early M-11-9''s had feeding issues that were eventually traced to poor quality metal used in the feed ramp. There were also issues of failure-to-fire and UFAF (unintentional full-auto fire) that were traced to poor quality firing pins and sear assemblies.