If I were you guys there is a guy still kicking I hope who is an authority on Chicago outfit. His name is John Bender or Binder I forget which a cool dude. He used to be on the discovery channel on the Chicago mob. His nick name is Westside Jack. He was also an Amature soccer player.

Ask him if he ever shot a tommy gun with live ammunition. Then ask him how acturate are they with live ammo.

I am sure you can find him on face book. Why not put your questions directly to him. I am very sure he knows all the answers without have to google them from bullshit sources.