I dont know where you got your information on what is legal to carry in NYC, but I would check those sources heavily. As someone who has lived in NYC for years, I researched it out, and this is the jist of what I found.
Blade have to be non-locking (slips only), and under 2.5"
They have to have a "non threatening tip"
Cant open with one hand
And of course, in NYC (not NY State, NYC has their own rules ontop of the state laws), if it could be used as a weapon, then it is illegal if the cop wants it to be.
Generally, if you dont want to carry a SAK or a really small slipit from Spyderco, then you are gonna have to break the law like all the rest of us.
Just dont use pocket clips in NYC ever. Cops look out for them like crazy. Keep it in your watch pocket, inside waist band, ect. I even carry my Spyderco Sage clipped to some paracord around my neck.
As for things said above:
It should be noted that cops don't walk down the street frisking people or looking for pocket clips.
Actually they do, it was just in the paper not a month ago. And they do target pocket clips, even though it is illegal, and there are hundreds of cases in courts currently because of the pocketclip issue. Believe me, they do look for pocket clips.
In the end. Honestly, ANY knife even if it meets all the requirements for being a legally carried knife, has two more loopholes to jump through.
One, you had it in your pocket, and thus have a concealed weapon. Now your in big trouble. Especially if you say its for self defense, looking like Rikers Island to me.
Two, Its a knife, and a knife is considered a weapon, and it is illegal in NYC to carry weapons.
So basically in the end. Get the knife that you like, keep it hidden and dont draw attention to yourself. Avoid pocketclips at all costs if you can.
Food for reading (NYC Lawyers who handle weapons cases had this to say):
The New York criminal defense attorneys and former Manhattan prosecutors at Crotty Saland LLP routinely get telephone calls from or represent individuals charged with Criminal Possession of a Weapon in the Fourth Degree in violation of New York Penal Law 265.01. Often times the story starts off the same. Not knowing it was crime to possess certain knives, a person is stopped after the police observe the clip of a knife outside their pocket. Ultimately, a knife is recovered and the police claim that the knife is a "gravity knife." Whether their arrest is in Manhattan, Brooklyn, the Bronx, Queens or anywhere in New York, the crime is the same. That is, Criminal Possession of a Weapon in the Fourth Degree is a misdemeanor punishable by up to one year in jail.
New York Penal Law 265.01(1) is a per se offense, meaning, the possession of certain weapons is an automatic crime. Possession of a "gravity knife" is one of the specified weapons regardless if your intended use was for work or protection. Having said that, one imperative step, which is fairly obvious, is to ascertain if in fact the alleged "gravity knife" is in fact a "gravity knife." As both a prosecutor and a New York criminal defense lawyer I have seen police make a mistake as to the nature if the knife. In those cases where the weapon is wrongly alleged to be a "gravity knife" and there is no intent to use the knife in a criminal way, the case may be one which should be dismissed.
Lastly, and again equally important to know, New York law only requires that you knew you possessed a knife and not that you knew you possessed a particular type of knife. In other words, if you knowingly had a knife on your person, but you had no idea it was a "gravity knife," your lack of knowledge as to the type of knife will not be a defense to its possession.
Criminal Possession of a Weapon in the Fourth Degree pursuant to New York Penal Law section 265.01 (NY PL 265.01). Punishable by up to one year in jail, this crime, often referred to as CPW 4, comes in two common forms. The first of these violations of New York Penal Law 265.01 is the "per se" offense where the possession of the weapon, no matter its intended use, is automatically a crime. The second violation of this statute occurs where the manner of the instruments use dictates the charge even if the weapon is not an object one would normally consider as such.
A person is guilty of Criminal Possession of a Weapon in the Fourth Degree, pursuant to New York Penal Law 265.01(2) when that person possesses a "dangerous instrument" or "deadly instrument" with the intent to use that weapon unlawfully against another person. Unlike 265.01(1) where the weapon in question is automatically a weapon solely based on law, this subsection includes anything that is a "dangerous instrument" or a "deadly weapon" where one, for example, attacks, assaults, threatens or menaces another person while possessing an instrument that could seriously hurt another. These weapons could include a baseball bat, broken glass or even a wire hanger if used in a violent way.
That last statement is included to point out that even if a knife is technically legal, and even if the case is thrown out in court, anything can get you arrested in NYC.