AK-74 be used by the majority of countries of the former Soviet Union. Additionally, licensed copies were produced in Bulgaria (AK-74, AKS-74 and AKS-74U), and the former East Germany (MPi-AK-74N, MPi-AKS-74N, MPi-AKS-74NK). Besides former Soviet republics and eastern European countries, Mongolia, North Korean Special Forces, and Vietnamese People's Naval infantry use AK-74s. The AK-74 was designed by А. D. Kryakushin's group under the design supervision of Mikhail Kalashnikov and is an adaptation of the 7.62×39mm AKM assault rifle and features several important design improvements. These improvements were primarily the result of converting the rifle to the intermediate-caliber high velocity 5.45×39mm cartridge.
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