Firearm a battle rifle such as the Karabiner 98k, but the chief differences defining an assault rifle are select-fire capability and the use of a rifle round of lesser power, known as an intermediate cartridge. Soviet engineer Mikhail Kalashnikov quickly adapted the German concept, using a less-powerful 7.62×39mm cartridge derived from the standard 7.62×54mmR Russian battle rifle round, to produce the AK-47, which has become the world's most widely used assault rifle. Soon after World War II, the Automatic Kalashnikov AK-47 assault rifle began to be fielded by the Soviet Union and its allies in the Eastern Bloc, as well as
Oficial AK-47 worked as the "enmascarado characters" Sureño de la Muerte and Black Stone. He is named after the AK-47 assault rifle. Wrestling most his career under a mask, Pardo's true identity was revealed on December 22, 2011, when he lost his mask in a match against Trauma I. Pardo made his debut in 2003, working as an "enmascarado" called "Sureño de la Muerte" (Spanish for "Southern Death"). Later on he was recast as "Black Stone", working on the undercard of various International Wrestling Revolution Group (IWRG) shows. In early 2007 IWRG officials decided to form a new version of the group