HB 5139 provides legal protections for peace officers and correctional facility guards who use less-lethal force weapons. It defines "less-lethal force weapons" as devices designed to incapacitate a target while minimizing the risk of serious injury or death, including stun guns, chemical dispensers, and impact weapons. The bill establishes a legal defense for officers who use these weapons in accordance with their training and when justified under the Texas Penal Code. This defense applies only if the officer’s actions are in compliance with established training standards​.