Debbie, airsoft laws as they apply to an adult like Scarecrow are, as he just said, far different if a younger person has it or an underage person has it.
The laws about Replicas are very clear; 18+. And even then you got to be careful for the reasons he just quoted. If you feel that the laws and rules in place here are not to your liking, unfair, or incorrect, you can decide to go elsewhere to get what you want.
Maybe you will succeed. God help you if you dont and the universe shits on you because waiting a few months or years to be 100% legal was too difficult. Just remember that the people you need to convince are the Police and, right or wrong, arguing with them is never a bright idea.