The research and the development of bulletproof armor or equipment to have the potential to prevent destruction or attacks from opponents by the analysis of 2-layer armor plates which consist of SKD11 which is a front plate that used to destroy the bullet when the bullet hit the armor plate and a SUS304 rear plate which is a high tensile stress material to restrain metal fragment of damaged the bullet when the bullet is made from Tungsten Carbide (WC) with the size of mm and the speed is 878± m/s according to NIJ (National Institute of Justice) test level 4. | Parameter analysis of SKD11 and sus304 bulletproof plate that resistance penetration of bullet mm according to standard nij 4 by finite element method
