hopefully you can still remove the site. I would take the screws and put a drop of your favorate solvent on them and let them soak for a while and remove the sight. the soak the sight is solvent and then start working on it very carfully. you may need to add some heat to help, BUT if you dont know what you are doing your sight will be damaged and then be worthless for shooting and only good for parts. i hope this will help you out.