I know this is an SKS sit, but I need a legal question aswered fro me. I have a stock .308 Saiga. There is a 20 rd. mag being built and some are saying that in order to use the 20rd mag I would need to change one item on my gun to be 922 legal. Some are saying just change th piston out for a US made I would be able to use the 20rd. Qusetion is, is this true and 2nd what happens when i want to usethe fact. 8 rd mag.?