These mags from Aimsurplus are Chinese "flat-back" mags. Though the description says "European" they are in fact chinese mags that were sold to Yugoslovia and now imported into the US. I prefer these to the usual com-bloc metal AK mags since they do lack the spine on the back of the magazine. I ordered 15 of these from Aimsurplus and they were all new...still covered in a light coat of cosmo.
At $9.99/each, you cant beat the price.
http://www.aimsurplus.com/product.aspx?item=MAK47E30&groupid=15
At $9.99/each, you cant beat the price.
http://www.aimsurplus.com/product.aspx?item=MAK47E30&groupid=15