The RPG-6 was the culmination of Russia's finest military minds during the Second World War. It was the second RPG to use a Shaped Charge concept as well as the High Explosive (HEAT) concept. It underwent testing in September 1943 and was in use the following month. It was designed for the replacement of the RPG-43 because, as the war progressed, the German's were still bulking up their tanks in an effort to hinder the Soviet's. The RPG-6 used 562 grams of TNT in a conical casing and shaped for maximum potential. The Soviet's found that the maximum effect from High Explosives was when it detonated a small distance before the target. This was implemented in the RPG-6's hollow-point noise, which put the explosives a sufficient distance away from the target. This setup proved that the RPG-6 could penetrate 100mm of armour, trumping any attempt the German's had with tanks. It was also used as an anti-infantry weapon, or a small, thrown bunker-buster. It was such a success that it went into mass-production and was used for a long time even after the war.