Premise: The AK-47 ( [ Автомат Калашникова , translit = Avtomat Kalashnikova , lit = Kalashnikov 's Automatic Rifle ] ) is a selective-fire ( semi-automatic and automatic ) , gas-operated 7.62 × 39 mm assault rifle , developed in the Soviet Union by Mikhail Kalashnikov . It is the originating firearm of the Kalashnikov rifle ( or `` AK '' ) family . Mikhail Kalashnikov . He is most famous for developing the AK-47 assault rifle and its improvements , the AKM and AK-74 , as well as the PK machine gun and RPK light machine gun .
Hypothesis: The AK-47 was not the basis for developing other firearms.
Label: CONTRADICTION