The SKS (Samozaryadny Karabin sistemy Simonova, 1945 (, 1945; Self-loading Carbine of (the) Simonov system, 1945) is a semi-automatic carbine chambered for the 7.62×39mm round, designed in 1943 by Sergei Gavrilovich Simonov. A reliable, simply designed, and relatively inexpensive weapon, the SKS was first produced in the Soviet Union but later widely exported and manufactured by various nations. Its distinguishing characteristics include a permanently attached folding bayonet and a hinged, fixed magazine. As the SKS lacked select-fire capability and its magazine was limited to ten rounds, it was rendered obsolete in the Soviet Armed Forces by the introduction of the AK-47 in the 1950s. Nevertheless, SKS carbines continued to see service with the Soviet Border Troops, Internal Troops, and second-line and reserve army units for decades.