Hey cop 369. I have read more negative about the triple k mags, than the others. For 10 round mags, promags are the way to go. They look high quality like Ruger mags, and mine work perfect. Course for hicaps, you can't beat rugers, but they are out of my price range $100. I have some PMI's they cost $39-$59. They work perfect for me. I also have some no names I got from cheaper than dirt. They work well, IF i leave out a couple of rounds, and load with the bolt open. With the cheaper mags it is hit or miss. Some can be used after reshaping the feed lips. I don't have any 40 rd mags, as they are kinda long for the bipods.