That is fascinating and certainly enlightening but it doesnt bolster the uncited statement in this article that the SIGs broke their frames in testing  Though I wouldnt be surprised that something was going on under the table with the Berettas I was in the military when we did the switch from the old s to the mm and the mm was a troublesome finicky weapon not suited for most of the environments that we had to use them in  The  might not have been pretty but it would take a lot more abuse than the Beretta would and keep firing  But thats neither here nor there my only contention is that theres an uncorroborated statement in this article that nearly the opposite is reflected in other articles