I just had a coworker who is looking at buying a .50 cal tell me that according to his father you need a Class III license to purchase. Another co worker who is rather knowledgeable on firearms told him the same thing. Is this true? I see no mention of this at the Barrett or Armalite websites, and I have never heard this from any one else before. So, do you need Class III license to purchase a .50 cal rifle? Thanks, modified.