Abstract: A firearm locking device increases firearm safety and security. A receiver cartridge shaped and sized with same caliber as firearm is loaded into bullet chamber. A barrel rod is removably engaged to the receiver cartridge and protrudes from the end of firearm barrel. Protruding end serves as fast visual indicator that firearm is unloaded and safe to handle, store, or display. A light pull on protruding end also serves as indicator that firearm is unloaded and safe. A lock and cable serve to lock the barrel rod to firearm's trigger guard to prevent removal of barrel rod from barrel.