SKS M question

I recently aquired an Norinco SKS "M" that takes AK47 mags. It came in a folding Combat Exchange folding stock. My question is, is this stock correct to this rifle? I read somewhere that some of these came like this. Any info would be appreciated!

Yes, read here.

http://www.sksboards.com/smf/index.php?topic=440.0

Thanks AKBLUE, tht is what I was looking for.