Heres a little something from AR15.com by Troy, he also did the work on the link above..........
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Some very common questions in this forum are:
"What brands of magazines should I buy?"
"Is [insert brand here] brand of magazine any good?"
"Are [insert brand here] mags as good as [insert brand here] mags?"
So, I'm posting my rankings for mags. I've listed them in order from best to worst, and grouped them into reliability tiers.
No doubt there will be people who disagree, and that's okay. You can feel free to reply and give your opinion. I'm just tired of answering these questions over and over...
1st Tier
1. HK SA-80 mags (new, expensive, and currently restricted to LEOs)
2. Factory teflon-finished USGI-type mags made by La Belle for a number of OEMs
3. USGI aluminum mags (includes Colt mags)
4. FN FNC mags (steel)
5. Sterling AR180 mags
6. British steel SA-80 mags
7. FedOrd/PMI steel aftermarket mags
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2nd Tier
8. Thermolds (USA made)
9. Thermolds (Canadian-made)
10. Orlites
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Don't Waste Your Money
99. All of the other aftermarket crap mags, including USA, Triple K, Western Metal, Victor, Millet, ProMag, RamLine, and Eagle.
-Troy