MAG brand magazines are by far my favorite choice when it comes to after market magazines.  I have owned them in the M4 flavor as well as the AK74 flavor and had no issue with either.  This review will cover the AK74 variant in the black/plum color scheme.

I have purchased 2 separate boxes of these for my Russian VDV load out.  Both sets came from Airsoft Extreme and ran about $60 dollars after shipping was factored in.  The box sets are 5 packs that come in a cardboard box with card dividers between the mags.

The magazines are heavy duty plastic expcept for the but plate which is sheet metal.  The magazines hold 100 rounds and feed every one of them for me.  I have tested these magazines in the TM AK47, Echo1 AK74, CYMA AKS74U, Dboyis RK-02 and RK-03 as well as the ICS AK74 and had no issues with any of them.  All in all a great deal for the money if you dont mind plastic magazines.