The SKS is a Soviet semi-automatic carbine chambered for the 7.62×39mm round, designed in 1943 by Sergei Gavrilovich Simonov. Its complete designation, SKS-45, is an initialism for Samozaryadnyj Karabin sistemy Simonova, 1945 (, 1945; Self-loading Carbine of (the) Simonov system, 1945). In the early 1950s, the Soviets took the SKS carbine out of front-line service and replaced it with the AK-47; however, the SKS remained in second-line service for decades. It is still used as a ceremonial firearm today. The SKS was widely exported, and was also produced by some former Eastern Bloc nations as well as China, where it was designated the "Type 56 Carbine", East Germany as the Karabiner S and in North Korea as the "Type 63". The SKS is currently popular on the civilian surplus market as a hunting and marksmanship semi-automatic rifle in many countries, including the United States, Canada, and New Zealand. Its age and numbers make it very inexpensive to purchase. The SKS was the second firearm after the RPD chambered for the 7.62×39mm M43 round, which was later used for the AK-47.

The SKS is a Soviet semi-automatic carbine chambered for the 7.62×39mm round, designed in 1943 by Sergei Gavrilovich Simonov. Its complete designation, SKS-45, is an initialism for Samozaryadnyj Karabin sistemy Simonova, 1945 (, 1945; Self-loading Carbine of (the) Simonov system, 1945). In the early 1950s, the Soviets took the SKS carbine out of front-line service and replaced it with the AK-47; however, the SKS remained in second-line service for decades. It is still used as a ceremonial firearm today. The SKS was widely exported, and was also produced by some former Eastern Bloc nations as well as China, where it was designated the "Type 56 Carbine", East Germany as the Karabiner S and in North Korea as the "Type 63". The SKS is currently popular on the civilian surplus market as a hunting and marksmanship semi-automatic rifle in many countries, including the United States, Canada, and New Zealand. Its age and numbers make it very inexpensive to purchase. The SKS was the second firearm after the RPD chambered for the 7.62×39mm M43 round, which was later used for the AK-47.