The Five-seveN pistol designed by FN company as a complimentary sidearm for the P90 submachine-gun. They share the same ammunition, 5.7x28mm SS190 cartridge. The SS190 ammunition looks like scaled down 5.56mm NATO round & boosts the 2.02 gram (31 grains) pointed steel & aluminum core bullet to the muzzle velocity of 650 meters per second from the pistol barrel. The idea is to provide good penetration against personnel protected by body armor, while keeping weapons' wt. & recoil reasonable.