TheSkunk, thanks for the specific answer. It does seem like your frame is defective, and I am surprised they haven't just replaced it.
I still think you should have realized the gun would not have a slide stop, and that any dissatisfaction with that is on you.
Did SIG say why they won't replace the gun? Have you asked them to replace it?
If I were you, I would strongly consider finding a SIG certified armorer in your local area, and having him assess the issue. If he concurs with the problem, that might give you the leverage you need with SIG customer service.
I still think you should have realized the gun would not have a slide stop, and that any dissatisfaction with that is on you.
Did SIG say why they won't replace the gun? Have you asked them to replace it?
If I were you, I would strongly consider finding a SIG certified armorer in your local area, and having him assess the issue. If he concurs with the problem, that might give you the leverage you need with SIG customer service.