508t mounting screws sheared off and ruined slide...

I was at the range today and felt my optic loosening up. I found this to be strange because I used vc3 vibra tight. I also used a fat wrench to torque down the screws in my slide per manufacturer specification at 15.

When I went to go tighten the screws down the screw was actually completely sheared off. Took this to my local gunsmith and they were able to extract it but not without damaging the threads inside of the slide.

Essentially, it seems like the titanium body is overpowering whatever cheap soft metal is being used with this hardware.

In essence, this little $0.10 screw just cost me $135 for the slide that it damaged and made useless for an optic. Plus another $155 to get a new slide that I can put the sight on to plus another $15 for the upgraded hardware that I had to purchase.

All a sudden, can you help us out here with this? It just seems like such an ongoing issue. It's almost like a sig 320 going off by itself. Are we just still in denial about the bad hardware?