One thing I've noticed about the damaged screw slots on this gun is that they were mostly caused by over-tightening with improperly sized drivers. Very few have any damage from loosening or removing them. So this makes me wonder: Was it common for these guns to shoot their screws loose? Take a real close look at this hammer screw slot. Fortunately, it's not on the "display" side of the gun. I'm not sure the photo will show it clearly, but to the naked eye it's obvious to me that this slot was damaged by clockwise turns. Ergo, someone was trying to tighten it down for the umpteenth time:
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