At least up until last year 2 blades are leagal nad are definitely still legal, 3 blades were not (although I don't see the big difference) I heard that someone talke to DEC and while they were very vague they did not say they were illegal. I shoot 2 blades and based on performance don't think there is any reason to shoot the 3's, the 2' are lethal, MIZ54, I recommend them highly