Where did it go? - Strike Industries Suppressor Height U-Notch Iron Pistol Sight

I kinda knew the front sight would go missing from the second the screw seemed to strip out. The allen wrench provided to install seemed to strip out when installing so i got my own allen wrench but it was alreadt too late. After trying for a couple of min it went in and seemed to tighten down but low and behold upon return from the range the front sight had dissappeared. I have used these sights before on a couple of sig 320s and the first had no issues but the second has a problem with the front sight as well. I like the blacked out for use with a red dot but i think i will use a different manufacturer.