The weapon used by this “perp” is the AK-47 7.62 x 39 mm caliber Russian round. It is more powerful than the .223/5.56 mm round, and it ranks just below the .30-30 Winchester on the power band. Unlike the .30-30 which uses a jacketed soft-point, most 7.62 X 39 mm rounds are  FMJ or steel cored (i.e., Russian/European army surplus).. The AK-47 type round has much greater penetration than a soft point or a hollow-point round. The 7.62 x 39 mm round has a muzzle velocity of 2,356 fps, and muzzle energy of 1,527 ft. pounds. That means it can slice through most radio cars and an issued ballistic vest like a hot knife through butter.