The bill seeks to strengthen the rights of individuals to bear arms in Washington State by reaffirming the protections provided by the Second Amendment and the state constitution. It declares that any state law imposing liability on the firearms industry or banning specific firearms is unconstitutional, thus making such laws ineffective. The bill introduces a new section that clarifies definitions related to firearms, including terms like "firearm," "large capacity magazine," and "dealer." It also reenacts and amends existing definitions in RCW 9.41.010 while repealing several previous statutes, including those related to "assault weapons," effectively removing restrictions on these firearms.

In addition to the aforementioned changes, the bill updates various definitions concerning firearms and mental health professionals, including terms such as "nonimmigrant alien," "pistol," "rifle," and "secure gun storage." Notably, the definition of "semiautomatic" has been deleted, and the term "semiautomatic assault rifle" has been clarified to exclude certain firearms. The bill also includes provisions for the repeal of specific acts related to assault weapons and firearm industry regulations, aiming to streamline existing laws. Furthermore, it establishes a new section defining the Washington state patrol firearms background check program, which will oversee background checks for firearm transfers, thereby modernizing the legal framework surrounding firearms in the state.