Good evening to you!! The Girsan MC1911S Liberador II 45 ACP Semi Auto Pistol doesn't have an optics cut. You can remove the rear sight and install a Novak style optic mount. See below for more information. Hope this helps. Have a good rest of your day.
🇺🇸🇺🇸 'merica' 🇺🇸🇺🇸
https://egwguns.com/pistol-and-red-dot-mounts/mounts-by-firearm-brand-sight-cut/novak/

Hi Michael and welcome. It is not factory optics cut but you can replace the rear sight with a Novak Style Optics Plate of the Red Dot footprint you want here: https://egwguns.com/pistol-and-red-dot-mounts/mounts-by-firearm-brand-sight-cut/novak/ ------------------- Cheers, stay safe and enjoy!