AZ SB1476

Creates new crime of "unlawful securing of a firearm" when a person with criminal negligence fails to prevent a minor under 17 from accessing a readily dischargeable firearm through failure to lock it or render it inoperable.

Establishes affirmative defenses including when minor uses firearm under supervision of adult 18+ for lawful hunting or sporting purposes, in lawful self-defense, during agricultural work, or when obtaining firearm through trespassing.

Classifies violation as class 6 felony, upgraded to class 4 felony if the minor discharges the firearm causing death or serious physical injury to themselves or another person.

Prevents arrest of family members (blood relatives, spouses, adoptive relatives, dating partners, guardians, or household members) for seven days if the minor's discharge caused death or serious injury to the minor.

Defines "readily dischargeable firearm" as a firearm loaded with ammunition, whether or not a round is in the chamber.