Never had a problem with ASC mags. People need to learn to take them apart and inspect them before they use them. I had 2 in a batch of 10 that the follower had misaligned with the spring and prevented the last round from being loaded, it also caused the last round to nose-dive into the mag instead of chambering. Took them apart, realigned them, no problems since. You can't expect a mass produced product to be perfect every time, mistakes will be made and often they can be easily corrected.