The AK-47 (also known as the Kalashnikov, AK, or in Russian slang, Kalash) is a selective-fire (semi-automatic and automatic), gas-operated 7.62×39mm assault rifle, developed in the Soviet Union by Mikhail Kalashnikov.
It is officially known in the Soviet documentation as Avtomat Kalashnikova (Russian: Автомат Калашникова).
The AK-47 has appeared in various episodes of NCIS such as the NCIS Season 2 finale episode, Twilight (episode) and the NCIS Season 12 episode, The San Dominick (episode) where numerous terrorists or criminals have been seen using the weapon against members of the main NCIS Major Case Response Team.
The AK-47 was seen in the Season 5 episode, In the Zone (episode).
It appeared in the Season 13 episode, Saviors (episode).