It is something you just have to learn by looking at examples of Russian and other countries Handguards, there are some that look VERY similiar. There is a difference in the Shellac and colors ,the lamination, the cut of the inside and outside, like the swells , and the reinforcing pin location. it is a feel you get after awhile..there are photos all over this Forum, look at the AKM photo sticky in the Russian section, then check Handguards for sale to see the finish and inside looks......