The M40 is a type of anti-tank guided missile developed by the United States. It was designed to engage and destroy armored vehicles and fortifications. The missile features a laser guidance system, allowing for precision targeting. Originally introduced in the 1960s, the M40 has been used in various military conflicts. It is part of a broader category of weapons known as anti-tank missiles, which are crucial for modern warfare. The M40 has undergone several upgrades to improve its effectiveness and reliability on the battlefield.