The output forms either an open circuit or a connection to ground. The output usually consists of an external pull-up resistor, which raises the output voltage when the transistor is turned off. When the transistor connected to this resistor is turned on, the output is forced to nearly 0 volts.
The Gun Control Act of 1968 (GCA or GCA68) is a U.S. federal law that regulates the firearms industry and firearms owners. It primarily focuses on regulating interstate commerce in firearms by generally prohibiting interstate firearms transfers except among licensed manufacturers, dealers and importers.
DC still has some of the strictest gun control laws under its Firearms Registration Emergency Amendment Act of 2008, including strict registration, a prohibition on assault weapons and a prohibition on large capacity ammunition feeding devices, which DC interprets to include all semi-automatic handguns fed from a magazine. Only revolvers are ok.