Firearms and Ammunition - As introduced, creates the offense of carrying or possessing a firearm, including a firearm that was privately assembled and does not contain a serial number or other mark that conforms with federal law, if, at the time of carrying or possessing, the person is not a citizen of the United States or a lawful permanent resident. - Amends TCA Title 39, Chapter 17, Part 13 and Title 55, Chapter 50.

SB 1253 creates a new Class A misdemeanor offense for individuals who carry or possess a privately assembled firearm without a serial number (or other federal-compliant mark) if they are not a U.S. citizen or lawful permanent resident. The bill directly affects non-citizens and non-permanent residents in Tennessee who possess such firearms, as defined by the law. Key provisions amend Tennessee Code § 39-17-1307 to prohibit this specific conduct, referencing federal firearm marking requirements under 18 U.S.C. § 923(i). The law would take effect July 1, 2025, if enacted.