This bill requires criminal background checks of buyers of firearms for private sales, transfers or exchanges at gun shows or private sales, transfers or exchanges resulting from advertising or marketing subject to certain exceptions. The bill provides that the first offense for knowingly selling, transferring or exchanging a firearm in violation of the criminal background check required by this bill is a civil violation for which the penalty is a fine of up to $1,000. The bill designates subsequent offenses as Class D crimes.