Vigilante

The Vigilante was a futuristic assault rifle that fired a concentrated particle beam of both unlimited range and unstoppable power. The weapon, requiring enormous amounts of energy, was powered by a plutonium carbine battery that acted as a miniature nuclear reactor. The Vigilante was originally designed by Dr. Alfred Hathaway, who, after being freed from an insane asylum by Robert G. Durant, began mass-producing the weapon for the criminal mastermind.