You should be fine bringing a scope like that in your carry-on. I’ve travelled with similar gear before and never had any issues, especially since it’s just an optic and not a controlled item like a firearm. Something like Vortex optics are usually treated the same way as your phone or laptop by the people who check what you bring on a plane in the United States and in most airports in Europe.. It is still a good idea to check the rules of the country you are going to visit, so you do not have any problems when you get there.