... AK472.Technical dataMaterialProtection levelPerformanceSizeWeight (kg)AluminumOxide NIJ IIIrifle bullets with 9.6g, speed less than 847m/s ... )1.90 (with vest)NIJ IVarmor-piercing rifle bullets with 10.8g, speed less than 869m/s ... (s)2.50 (v)Silicon carbideNIJ IIIrifle bullets with 9.6g, speed less than 847m/s ... caliber. (M80)25*30cm2.0NIJ IVarmor-piercing rifle bullets with 10.8g, speed less than 869m/s, ...