Arkansas

Arkansas – 5-73-121. (a) A person who carries a knife as a
   weapon, except when upon a journey or upon his own
   premises, shall be punished as provided by section 5-73-
   123(b).
(b) If a person carries a knife with a blade 3-1/2 inches
   long or longer, this fact shall be prima facie proof that
   the knife is carried as a weapon.