S-300V/VM/4 are considered ABM systems (much like AEGIS) as they were designed specifically to fight off short range BM systems like SCUD. AEGIS and alike has never fired against a missile with much longer range than 1,500KM and with multiple warheads. Russia has been well known to be advanced in air defence systems. Tor being the first Anti-PGM (Precision Guided Munition) system to protect armoured columns and location from guided munitions attack. S-300, being as old as it is, is still feared around the world (hence why people still want it, like Greece, a NATO country). Remember the outcry from USA over the possible sale to Iran for S-300?