The SKS ingame is a Yugoslavian M59/66 PAP, as such, the description and name are wholly incorrect. Try to address that at least in description.
Also, they have been missing a butt plate, which is an integral part of the buttstock (http://www.localnumber69.com/temp/Yugo_SKS.jpg) as seen here. Please see with art team to have this fixed.
These bugs have been persisting since the first day they have been added.