Hello, im sure this is a subject that is touched on much, however whenever i read the forums there is so much debate. So im just looking for a few answers. A chinese Norinco Mak 90, pre-ban, was gifted to me by a guy who doesnt like russian style weapons. I know that it is a standard Mak 90 Sportster with no illegal third hole. It is completely stock everything, all the pieces match the serial number, gun was checked out and its a clean gun. My question is, what i need to make sure what not to do the make it illegal. I hate the thumb hole stock, and i currently use tapco 30 round mags with it. I plan on replacing the stock with synthetic pieces because i hate the thumbhole stock. This concerns me because i read alot of forums stating import guns arent allowed to have assault weapon items like folding stocks and bayonets. But this also confuses me because i can go to a local big sportsman store and buy an Ak with folding stock and such right off the shelf in a hour. Basically my question is what can i not do to my gun, and if so why cant i if i can simply go buy a assembled gun as such.