Criminal Offenses - As introduced, creates a Class E felony for altering or defacing a permanent distinguishing number on a firearm and selling, purchasing, or possessing such a firearm with a mandatory minimum sentence of 180 days incarceration. - Amends TCA Title 39, Chapter 14, Part 1; Title 39, Chapter 17, Part 13 and Title 40.

SB 243 creates a Class E felony for altering, defacing, or removing a firearm's permanent serial number or distinguishing mark, or for selling, purchasing, or possessing such a modified firearm. It directly affects individuals who tamper with firearm identification or handle firearms with altered markings. The bill imposes a mandatory minimum 180-day prison sentence for violations, with no possibility of early release. This law amends Tennessee Code sections covering criminal offenses related to firearms and takes effect July 1, 2025.