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-9 It is one of the latest models of the popular Kalashnikov rifle series. It is based on the AK-100 series, which is a modernization series of Kalashnikov assault rifles. A unique feature of the rifle is the use of the special subsonic cartridge 9×39mm SP-5, SP-6. According to its characteristics it competes against the 9A-91, AS Val and SR-3M, but has seen limited use compared to these counterparts, which have already seen service in Russian military and police units. In 2006, Russian authorities wanted the Izhmash factory to design a rifle with Kalashnikov properties, but suitable to be used in