armour-piercing, fin-stabilized discarding-sabot

…began to be superseded by armour-piercing, fin-stabilized, discarding-sabot (APFSDS) ammunition. These projectiles had long-rod penetrator cores of tungsten alloy or depleted uranium; they could be fired with muzzle velocities of 1,650 metres (5,400 feet) per second or more, making them capable of perforating much thicker armour than all earlier types…