The SKS (Samozaryadniy Karabin sistemi Simonova. Translated: Self-loading carbine, Simonov's system) is a semi-automatic rifle designed by Sergei Gavrilovich Simonov in 1945. It has a 10-round capacity in a non-detachable magazine or a 30-round capacity in the detachable magazine. It comes with a wooden stock, but a variety of composite stocks are now available as replacements.
Flip the switch on the right side of the rifle to a vertical position and pull the pin outward.
Remove the receiver cover and buffer assembly by gently pulling backward.
Pull the charging handle back to remove both the bolt assembly and the charging handle.
Turn the rifle upside down and set it on a smooth surface.
Use a Phillips screwdriver to press down the button behind the trigger loop. This will cause the trigger assembly to pop up. Be careful: The trigger assembly is spring-loaded.
Turn the rifle over and lift the barrel assembly out of the stock.
Flip the lever in front of the rear-sight post to release the gas tube assembly.
Remove the gas piston.
Using a small nail or hole punch, push the retaining pin out of the back of the rear metal cover of the handguard.
Remove the wooden handguard. You can now attach the new stock.
Always be sure to check the chamber before disassembling any firearm. Never attempt to diassemble a loaded firearm.