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 (AK-47) or hair (Arlequin). In the end AK-47 pinned Arlequin and watched as his opponent was shaved bald after the match per Lucha Libre traditions. AK-47 also won IWRG's annual "Castillo del Terror" ("Castle of Terror") match in 2009, unmasking Yack. On March 3, 2011, "Los Oficiales" lost the IWRG Intercontinental Trios Championship to Joe Líder, Silver King and Último Gladiador, ending their reign at 886 days. On December 22, Oficial AK-47 teamed with Trauma I to face Oficial 911 and Trauma II in a "Relevos Suicidas" match and after losing the match, AK-47 and Trauma I were forced to