I would use a Silence Rail gun that shoots Ice cicles that are made out of purified untraceable water frozen by liquid nitrogen right before being fired at over 4,000 feet per second leaving nothing but a hole in the heart of my target.
I DONT KNOW WHAT YOUR TALKING ABOUT NO I DONT DO THIS FOR A LIVING!
I'd smother them all in tacos. All these random people would be dying because a batch of tacos fell on top of them from a bucket on a building's roof, or from a truck carrying a Taco Bell shipment. It would be A VERY STRANGE TALE INDEED.
archery(english longbow, not native american style, made for longer distance firing) poisoned arrows, knives for close up fighting(18 throwing, two fighting) metal forearm braces/covers(mostly for defense, although they would theoretically hurt like hell to get knocked with)
For a unique signature weapon i would use something akin to a single piece iron hammer. It would have a thin profile and made out of one piece of wrought iron. One end would have a claw and the other a blunted end and a sharp point on the top. This could be used for killing and utility (double as a wrecking/pry bar and have the ability to puncture things and cut them)
Long range if no firearms are allowed then i would use a dart thrower that works on compressed air. Use darts coated in Ricin that are very thin. Its not like a game where they just drop dead in a few seconds but they would be dead in a matter of days and i would be long gone.