A Rocket Propelled Grenade (RPG) is a shoulder-launched, man portable weapon which is used to fire a warhead over long distances. The RPG's warhead varies, with High Explosive (HE) being most common for use against personnel and bunkers, High Explosive Anti-Tank (HEAT) used against armored vehicles, and a variety of rarer speciality types available as well. The most common rocket propelled grenade launcher is the RPG-7, a Russian design that dates from the Second World War, and consists of a reusable launcher and the rocket propelled grenades themselves. This design is still used by low technology armies and insurgents on battlefields and warzones today.