The Thompson submachine gun was of a family of guns that achieved enormous popularity throughout the Prohibition era in the United States.
The Thompson submachine gun was a very common gun during its time. The automatic gun dominated the use of both criminals and law enforcement individuals. The Thompson submachine gun was also referred to as the Chopper, Tommy Gun, Chicago Piano and Chicago Typewriter. The gun was the favorite of civilians and soldiers for its large .45 ACP bullet, compact siz and extremely high volume of automatic fire.