i would NOT suggest buying/relying on any type of weapon. for the one guy u have, they'll have 5 (if they truly are as bad as they sound.) ur best bet is to keep it below radar, and strength in numbers.
psh...buy a honda, put a 747 wing on it, fart can (has to be ATLEAST 12 inches in diameter) and a front UNPAINTED body kit so u'll REALLY blend in