The FMK-5 is a circular Argentinian minimum metal anti-tank blast mine. For a topic outline on this subject see List of basic Argentina topics. A Minimum metal mine is a Landmine that is designed to use the minimum amount of metal in its construction An anti-tank mine, (abbreviated to "AT mine" is a type of Land mine designed to damage or destroy vehicles including Tanks and Armoured fighting Like the FMK-3 mine it uses a FMK-1 anti-personnel mine as a trigger. The FMK-3 is a Fibreglass cased Argentine anti-tank blast mine. The FMK-1 is a small circular Argentinian anti-personnel blast mine, fitted with a stiffened pressure plate it is also used as the fuze for the FMK-3 and The FMK-1 is fitted with a stiff cap to increase its activation pressure to 300 kg. Without the cap, the mine would be triggered by a load of less than 50 kg.