Question: are butterfly knives illegal in new york state?
Answer: Concealed carry of a double-edged knife is prohibited. Automatic (switchblade) and gravity knives are prohibited. ... In New York, the balisong has been determined not to be a gravity knife, and therefore not prohibited under the Penal Law [see: People v. Zuniga, 303 A.D.2d 773 (2nd Dept.