Tennessee Code Title 4. State Government § 4-54-105

(1) A firearm that cannot be carried and used by one (1) person;

(2) A firearm that has a bore diameter greater than one and one-half inches (1 1/2 ") and that uses smokeless powder, not black powder, as a propellant;

(3) Ammunition with a projectile that explodes using an explosion of chemical energy after the projectile leaves the firearm; or

(4) A firearm that discharges two (2) or more projectiles with one (1) activation of the trigger or other firing device.