The M-40 is a type of portable, shoulder-fired anti-tank weapon used by military forces. It was developed in the 1960s and is known for its effectiveness against armored vehicles. The M-40 uses a rocket-propelled grenade, which allows soldiers to engage targets from a safe distance. This weapon is part of a broader category of anti-tank systems, which includes other devices like the AT4 and Javelin. The M-40 has been utilized in various conflicts and remains a significant tool for ground troops in modern warfare. Its design emphasizes ease of use and mobility on the battlefield.