Firearms and Ammunition - As introduced, prohibits the possession, manufacture, transport, repair, or sale of a switch or auto sear device designed, made, or adapted for the purpose of converting a weapon to shoot automatically more than one shot, without manual reloading, by a single function of the trigger unless certain exceptions apply. - Amends TCA Title 39, Chapter 17, Part 13.

SB 957 bans the possession, manufacture, transport, repair, or sale of "switch or auto sear devices" that convert firearms to shoot multiple rounds automatically with a single trigger pull - without manual reloading. This directly affects individuals and businesses handling such devices, including gun owners, dealers, and manufacturers. The bill amends Tennessee's firearm laws to add these devices to prohibited items, with limited exceptions, and classifies violations as a Class E felony. It will take effect on July 1, 2025.