I run 5 mags on my AK, 2 plastic tapcos and 3 metal surplus, never had any problems with them, pretty much hit or miss with the tapcos, only thing I dont like about them is a increase of wobble on my m70, but they are a lot smoother when it come to doing fast mag swaps.
I"ll keep MY FIREARMS and MY MONEY, you keep your "CHANGE"
People tend to have negative thing to say about the polymer mags, but when my brother and I took his ak's out shooting for the first time, both of us preferred his polymer mags to his standard steel ones. It wasn't an issue of cleaning or needing oil, as he is a bit of a clean freak, but as far as form and function goes, as I said, we both preferred the polymer mags.
As far as my pistols go, I like to keep at least 4 mags for each one, so I would say at least that for your AK. ammunitiontogo.com usually has good deals on bulk orders.
Like:
http://www.ammunitiontogo.com/produc...ines-ak47-mags
and
http://www.ammunitiontogo.com/produc...ines-ak47-mags
YMMV.
Whenever my wife asks me why I never wear pants around the house I simply remind her:
"A lie gets halfway around the world before the truth has a chance to get its pants on.” - Winston Churchill
The truth wears NO pants!