Popularization of bulletproof equipment levels

With the continuous development of human body bulletproof equipment after World War II, a level system for verifying bulletproof capabilities has emerged. The following mainly introduces the latest bulletproof equipment levels of the military power, the United States.
The bulletproof equipment of the United States leads the world's development direction, after all, it is a country of gun freedom, and there is no ambiguity in the formulation and updating of bulletproof levels.
The American standard NIJ 0101.06 version is currently the mainstream bulletproof standard abroad, and generally small countries purchase products based on this standard.