Well, I put it back in and hit the middle with a lighter. That blistered the pipe just enough to keep it in, works for now.
I'm glad you didn't use any kind of glue. Heat, used to just slightly flair the ends, is the correct fix.
My Single Ten sights are holding up fine. So far. However, several years ago I had the same problem with the front sight fibre optic piece falling out of a set of William's Fire Sights that I had installed on a .45 semi auto.
I called Williams, spoke to a very helpful Customer Service guy who told me how to reinstall and heat the material to flair the ends. He also sent me, no charge, a 2" piece of the fibre optic material in the correct color (green) and diameter, just in case I messed up my first attempt at reinstalling the loose piece.
So, based on my experience, if you have any issues with your ST sights, call Williams Customer Service. They will take good care of you.
No, I'm not affiliated in any way with Williams. Just a satisfied customer.
