Firearms and Ammunition - As introduced, enacts the "Second Amendment Civil Rights Act of 2018"; confers private right of action upon a person to challenge a government entity that refuses to make property available to third parties for Second Amendment activities when the property is made available for other activities; prohibits government entity from banning the possession of a handgun by a handgun permit holder on property owned or administered by the entity unless security officers inspect all persons entering the premises. - Amends TCA Title 39, Chapter 17.