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
AK-22 not be confused with the weapon commonly sold in America as the Armscor AK22 Sidefolder, which is a sporter, rimfire AK-47 semi-automatic version manufactured in the Philippines as the MAK-22F and sold with a side-folding stock. The two weapons are extremely different both cosmetically and internally. Besides reference to commercial .22 rimfire models of the AK rifle, the terms AK22 and AK-22 are also used to refer to illicit underground manufactured .22 rimfire weapons designed to mimick the appearance of the AK rifle, such as the weapons used in the July 2016 Dhaka attack. AK-22 An AK-22 "Trainer" is a