Firearms and Ammunition - As introduced, increases from a Class A misdemeanor to a Class C felony the offenses of unlawful purchase by or unlawful sale to a person who is prohibited by state or federal law from owning, possessing, or purchasing a firearm; prohibits the purchase or sale of ammunition by or to such a person; prohibits the transfer or sale of a firearm or ammunition to a person receiving treatment at a treatment resource for mental illness or serious emotional disturbance and not just when the person is receiving inpatient treatment. - Amends TCA Title 39, Chapter 17, Part 13.