LCT grub screw stripped

The screw on my ak is entirely stripped and I’m having trouble removing it. I’m trying to move the rear sight so I can access the grub screw under the sight which is ALSO stripped. I’m not sure why they were so tight but now I’m not sure I’ll be able to disassemble. Any tips?

The screw on my ak is entirely stripped and I’m having trouble removing it. I’m trying to move the rear sight so I can access the grub screw under the sight which is ALSO stripped. I’m not sure why they were so tight but now I’m not sure I’ll be able to disassemble. Any tips?