AP MINE FOR M131 MODULAR PACK MINE SYSTEM (MOPMS)anti-personnel mineThe mine is a metal cylinder that houses the electronic and warhead components. The cylinder is encased by a spring finger assembly which aids in preventing the mine from settling on its side. Early models had finger tips bent at 90 degrees which would fold over the top of the mine; later models do not have the bent finger tips. One end cover contains an off-center hole for the borerider pin and four tripline ports, located 90 degrees apart. The other end cover contains only three tripline ports. This is a surface-delivered, bi-directional electro-magnetically armed apers landmine. It is delivered by a surface-placed M131 MOPMS mine system. The mine is fired by tripline sensors, physical movement, low-voltage detection, timer malfunction, or self-destruct timers.Diameter: 121mm Length: 66mm Weight: 1.6kg Explosive: 325g Range: 200m Explosive/filler type: Composition B-4USA