The AT4 is a portable, shoulder-fired anti-tank weapon developed by the Swedish company Saab. It is designed to engage armored vehicles and fortifications. The AT4 is lightweight and easy to use, making it suitable for infantry units. It features a single-shot design, meaning it is fired once and then discarded. The weapon uses a rocket-propelled grenade that can penetrate armor effectively. The AT4 is widely used by various military forces around the world, including the United States and NATO allies. Its simplicity and effectiveness have made it a popular choice for ground troops in combat situations.