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.
AK-12 all of these features. In January 2012, the Russian Deputy Defense Minister announced that the Russian Army would not be buying the AK-12, as they had millions of surplus AK-74 assault rifles and over concerns of the financial state of Izhmash. Despite this, the Russian Ministry of Defence began trials of the rifle on 2 November 2012. It was tested for its effectiveness when exposed to freezing cold, desert heat, humidity, dust and impacts. By 23 November 2012, trials were about 80 percent complete. During these initial tests, the AK-12 was found to have a "range of defects". The specific