It wasn't from my experience it was from the mouth of a friend who just got out after several deployments... most failures happen because of the mags, if you properly maintain a USGI it will be fine, but one can say that a Pmag does take more of a beating... I am betting that when I am going through basic I will be using ancient USGI mags, and from what I understand the M16's at FT. Jackson are even older... but they do work great...(somewhat...)I disagree with this sports bud. All of my USGIs drop freely in training and combat. It's never been an issue having them drop freely for me or my squad members. Even diving against stone or walls, or running around my truck getting the f out of the way of contact. I haven't smashed or broke a mag, even in an ied blast. I've seen machine gun belts cook off in a pressure switch ied explosion but not the USGI mags. I trust them 110%.