https://www.lawfletcher.com/blog/2016/april/gravity-knifes-law-in-new-york-may-violate-secon/
Gravity Knifes Law in New York May Be Unconstitutional
Recent decision by US Supreme Court may overrule New York's law against gravity knives and other per-se weapons
in new yorkgravity knifesmay belawunconstitutional