Either way , you will have a bad day . For us civilian guerillas , who wont have the luxury of support or ideal conditions , the AK is still king for dirt , filth , and neglect , not to mention going through cover easily , that the 223 will not ( as most people hide behind things when they are , or know they are going to be shot at ) . Curious to see the same study made with an AK 74s 5.45 x 39 . Also the study is assuming that the 7.62×39 is FMJ , SPs get ugly fast . But I wouldnt want to get hit by either a 39 or 223 , when all is said and done .