The "Killer Robot Attack Ban Act" establishes a legal framework to prohibit the manufacture, possession, use, and sale of lethal autonomous weapon systems within the state of Montana. The bill defines a "lethal autonomous weapon system" as a weapon that can autonomously attack targets without human intervention and is capable of causing destruction, injury, or death. It also outlines that both individuals and business entities are subject to this prohibition.

Violators of this act face severe penalties, including imprisonment for up to 20 years, fines up to $50,000, or both. The bill includes provisions for codification into existing law and stipulates that it will take effect immediately upon passage and approval.