Firearms and Ammunition - As introduced, deletes the offense of carrying a firearm or a club with the intent to go armed, prohibits the carrying of a firearm or weapon inside of a K-12 public or private school and on a school bus if the person's intent is to go armed and the school and the bus are posted in a certain manner; deletes the offense of carrying a firearm on the property of a university, college campus, and other public or private non-K-12 educational institutions or property; rewrites the offense of possessing a handgun while under the influence of alcohol or any controlled substance or controlled substance analogue; rewrites the offense of carrying weapons during judicial proceedings; makes various other changes related to firearms. - Amends TCA Title 16; Title 36; Title 37; Title 38; Title 39; Title 40; Title 49; Title 55 and Title 65.