I just bought my first AR, a Colt Sporter Lightweight, pre ban. I've never even SHOT one of these, much less owned one. Got it from a friend who bought it new eighteen years ago, and put it in his safe, and it's sat there ever since. Nice, no frills, fixed stock basic AR. I got one thirty round mag with it; what are the best mags for the money? I want to buy five or six more, and I want the best quality ones I can find. Any suggestions?