The SKS is a Russian 7.62x39mm caliber semi-automatic carbine, esigned in 1945 by Sergei Gavrilovich Simonov. SKS is an acronym for Samozaryadniy Karabin sistemi Simonova (Russian: Самозарядный карабин системы Симонова), 1945 (Self-loading Carbine, Simonov's system, 1945), or SKS 45. The SKS carbine was rather quickly phased out of first-line service, replaced by the AK-47, but remained in second-line service for decades afterwards. It remains a ceremonial arm even today. It was widely exported and produced by the former Eastern Bloc nations, as well as China, where it was designated the "Type 56" (and, in modified form, the "Type 68"), East Germany as the "Karabiner S" and in North Korea as the "Type 63". It is today popular on the civilian surplus market in many countries. The SKS was the first weapon chambered for the 7.62x39mm M43 round later used in the AK-47 and RPK.