The modern antitank round of choice is Armour Piercing Discarding Sabot Fin Stabilized (APFSDS) which is referred as SABOT or FIN if you are British. The Sabot round is a long (almost 1m) and thin (2-3 cm) pointed rod of a dense metal (tungsten or similar) with stabilizing fins on the end. APFSDSDUS - this is a tank armament round. It stands for Armour Piercing Fin Stabilised Discarding sabot Depleted Uranium Shell. It's what the Gulf War 2 veterans are saying may be causing ill health amongst them.