Hello, I'm new here, and to Sigs.
I have a 365xl. I'm trying to remove the rear sight, to install a Holosun green dot.
I have not been able to get either screw to break loose, and, in fact may have stripped both screws.

I have removed the striker, and have slide ready for the vice.

Should I add heat to the screws, then try to remove...??

All comments are welcome,
Thank you,
Pb

Heat can help. I would put a soldering iron on each screw and get it good and hot before trying again.

Thanks for the reply.
I did that very thing, (soldering iron), and it did not help.

Off to a local gunsmith tomm.
Thanks
Pb