Here is a great web site on SKS

YooperJ is the best site I have found on SKS's. Any thing from the history, types of rifles, where the SKS was made (country of origin), date your rifle (in most cases), mint marks and so on. If you are looking to get some thing fixed, this is NOT the place to be. Here is the web site www.yooperj.com (click on SKS). Feel free to leave some feed back on the site.