Because the Avenger fires such big bullets (artillery shells 3 cm wide, which also explode) at such a high rate of fire (up to 40 every second) many believe it can destroy any target very easily, even tanks with thick armour such as the M1 Abrams. This is wrong. The bullet can go through thin metal on a car or truck, but it cannot against the thick metal covering a tank. It can only destroy them because most tanks only have thin metal on their top to make them lighter. If an A-10 manages to shoot there, then it is bad for the tank, but if it shoots the front or side where the metal is thicker, then the tank will not be damaged.