Provides that the Act may be referred to as the Responsible Gun Manufacturing Act. Amends the Criminal Code of 2012. Provides that a person commits the offense of unlawful possession of weapons when the person knowingly manufactures, sells, or offers to sell, purchases, receives, manufactures, imports, or transfers a convertible pistol. Establishes penalties. Provides exemptions. Provides that a machine gun also includes any convertible pistol equipped with a switch. Defines "convertible pistol", "switch", and "common household tool". Contains a severability provision.