Firearms and Ammunition - As introduced, permits the largest municipality in Shelby, Davidson, Knox, or Hamilton county to regulate the manner of storage of firearms, firearm ammunition, and firearm accessories by ordinance, resolution, policy, rule, or other enactment. - Amends TCA Title 39, Chapter 17, Part 13.

HB 1231 would allow the largest municipality in Shelby, Davidson, Knox, or Hamilton County (based on 2020 census population thresholds) to create local rules about how firearms, ammunition, and firearm accessories must be stored. Specifically, it amends Tennessee law to permit these cities to regulate storage through ordinances or other local policies. The bill directly affects only the most populous cities in those four counties (requiring city populations ≥181,000 and county populations ≥366,200). It does not change state-level firearm laws but gives specific local governments new authority over storage requirements. The bill takes effect July 1, 2025, pending legislative approval.