I have had many 10K rnds through my Beta magazines without a single malfunction. All of these are in my M16 LMG/LSW. The problem with the Beta magazines is no one reads the instructions and do not put a squirt of graphite into it every couple of magazine loadings. I know they are not perfect but people have given me their Beta mags that did not work and I take them apart, clean them and then graphite as instructed and the function flawlessly. The original owner then starts swearing about them and I return the mag and give them instructions. I do not shoot in hostile environments and would not trust them in such to save my life.
Proof video
http://www.youtube.com/watch?v=WriIGNW1nKY
