ATGM is an abbreviation for anti-tank guided missile. Wire guided anti-tank guided missiles were invented by the French in the 1950s, and were a revolutionary anti-tank weapon. The missiles are 'flown' by the gunner to ranges of 3000 or 4000 meters with very high accuracy. The heavier vehicle or tripod launched missiles have HEAT warheads that penetrate two or three times the maximum armour of older main battle tanks -composite and reactive armours are less susceptible to HEAT missiles. Research ATGM