According to the bulletproof performance, this standard divides the ballistic protection ability of bulletproof vests into 7 grades. The ballistic threat caused by bullets to the human body is related to factors such as bullet composition, shape, caliber, quality, incident angle, and impact velocity. Due to the diversity of bullets and the fact that bullets of the same caliber can have different shells, as well as the existence of hand-loaded ammunition, the body armor that can resist the bullet test of a certain caliber in this standard may not be able to resist the bullets of the same caliber but with different dosing methods. Shooting of bullets. For example, body armor that prevents full penetration of 40S&W may not be able to withstand higher velocity 40S&W fire tests. In short, body armor that can protect against a specific weapon may not necessarily prevent complete penetration of bullets of different structures or structures under the same caliber. The munitions covered in this standard represent common threats that law enforcement officials frequently encounter.
The NIJ bulletproofhas developed a series of standards, such as NIJ Standard-0101.06, that specify the requirements and testing protocols for different levels of ballistic protection. These standards are widely recognized and used by manufacturers, law enforcement agencies, and other entities involved in the production and evaluation of bulletproof vests.