Firearms and Ammunition - As introduced, prohibits the possession of an assault weapon; directs those in possession of an assault weapon before July 1, 2025, to apply for a certificate of possession; creates the Class E felony offense of purchasing, selling, possessing, or using a part, component, device, or attachment designed to accelerate the fire of a semiautomatic rifle and makes any semiautomatic rifle that includes an accelerated fire part, component, or device a prohibited weapon. - Amends TCA Title 4, Chapter 54; Section 38-3-119 and Title 39, Chapter 17.

HB 944 prohibits the possession of specific firearms defined as "assault weapons" (including models like AR-15s, AK-47s, and certain semiautomatic rifles/pistols) in Tennessee. It requires current owners to apply for a "certificate of possession" by July 1, 2025, to legally retain these weapons. The bill also creates a Class E felony for purchasing, selling, or possessing parts designed to accelerate fire in semiautomatic rifles, making any rifle equipped with such parts a "prohibited weapon." This directly affects Tennessee residents owning the listed firearms or related components.