Though the guns are manufactured in Arizona, some of the testing was done down the road from my place, and I know the folks that did the testing. I won't give a round count since I suspect that is priveleged knowledge, but it was in the tens of thousands of rounds for both guns (in the testing that was done here), and from what I have read, gun writers were invited to put several thousand rounds though a dozen, or so pistols before they were released for sale. I have seen modest peening myself, and am sure that no one here is lying, or photoshoping the photos, still, the guns that were tested functioned fine through it all. Let me say here that I have also seen that peening on some 1911 locking lugs /mating surfaces. Now, I can see where excessive peening might prevent a gun from going into battery, but I hadn't heard anything documented, or seen that happen myself. From the little that I have actually seen, it seems to be a timing / fitting issue just as it was in the 1911's that I saw. I examined a couple more SR-9's the other day, one that showed modest peening, and one that did not. I will be the first to admit that I am no semi auto pistol guy. All the prototype guns that I have built, or supervised the building of have been revolvers, shotguns, bolt action, and semi auto rifles. I am just reporting what I have seen, and what I have heard first hand from folks that I trust, and have known for a long time.