According to the legend, the box gun was designed by three Fidler brothers (Fidel, Friedrich and Josef Feedle) in Mao Se factory, which used work and leisure to chat. Why is it controversial? First of all, this gun was patented by Mao Se, so some people took it as evidence of Mao Se's active participation. However, Germany's patent law allows companies to be named by inventors as representative applicants and patent owners, unlike the United States, and then transfer patent rights. However, it was Mao Se himself who applied for a patent for the box gun in the United States. The second reason is that after the end of World War II, the American military commander stationed in the Mao Se factory, knowing what medicine he had taken, ordered the records of the Mao Se factory to be burned with torches. Since then, Mao Se rifles and Mao Se pistols all over the world have lost their birth certificates, so everyone has to guess. The burned records also include documents such as research and development logs, so it is still controversial who invented the box gun.
Box gun, also known as Fidler pistol in Mao Se factory, is another proof that the three brothers have a lot to do with it. At that time, semi-automatic pistol had just started, and no army in the world had used semi-automatic pistol as a standard weapon. Mao Se knew that if he wanted to succeed, he had to get a military contract from a major power, so he named this box gun Mauser military pistol, model 1896, hoping to get a military contract. However, contrary to expectations, until 1939, when the Mao Se factory stopped production, no country in the world adopted the box gun as the standard weapon of the army. The production of box guns has been delayed for forty years. Mao Se factory estimates that it has produced about1000000 various box guns.