TKB-408 was a precursor to which heavily-modified Kalashnikov rifle as selected by the Red Army?
TKB-408:  It was created by German A. Korobov and submitted to a set of official trials conducted in 1946 to select an assault rifle for the Red Army. AK-47: The AK-47, or AK as it is officially known (Russian: Автомат Калашникова , "Avtomat Kalashnikova ", 'Kalashnikov's Automatic Rifle' ), also known as the Kalashnikov, is a selective-fire (semi-automatic and fully automatic), gas-operated 7.62×39mm assault rifle, developed in the Soviet Union by Mikhail Kalashnikov.
i don't know