Who makes a reliable hi-cap magazine for a ar15!? A friend of mine bought a 30rnd mag for his at a local store and it would jam at least once every 2-3 rounds! It would usually try to feed 2 bullets at the same time causing the bolt to hang. I just bought a triple K brand 20 rounder and it jammed twice on me when there was 3 rounds left in it. the last time it was pretty bad, the bolt wedged itself under one cartridge about 1/2 inch and then another one was trying to feed into the chamber... ( I have a pic I will post tomorrow sometime to try to help explain) we both have factory 10 round mags that feed flawlessly in both our guns. so I don't think it is anything wrong with the gun itself. Where in the hell can I find a reliable feeding 20-30 round magazine!!!