7.62x39mm, which is used in all SKS rifles (aside from the former Soviet Union, the SKS was also manufactured in China, Vietnam, North Korea, Albania, the former Yugoslavia, East Germany, and Romania).
The SKS is designed to fire the 7.62x39mm cartridge, not the 7.62x54mmR. Attempting to shoot 7.62x54R ammunition from an SKS could cause serious damage to the rifle and pose significant safety risks to the shooter. It's crucial to use only the appropriate ammunition specified for the firearm to ensure safe and reliable operation.
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Russian
Very similar, minor differences,
Importer name
they are about $100
This is purely opinion on my part, but the SKS was created in Russia, and made there for a number of years before the Chinese began manufacture. The Russian SKS tends to have better quality machining than the Chinese. Both are good, but the Russian is the original, and the better built rifle. Examine one of each side-by-side, and see what you think.
i called sks man and he shipped mine in the regular mail no problems at all his site is sksman.com his name is paul hes not supposed to but he does ship them just look at canadiangunnutz.com lots of Canadians get there's from him
20-45 USD
Markings.
The RUSSIAN SKS may be date marked on top of the receiver cover (properly called the rear housing) , along with the symbol of the arsenal that made it.
It must have the importer's name and location.