The Man with the Gun in this well-paced western is played by Robert Mitchum. A notorious gunslinger, Mitchum has been hired by a group of concerned citizens to restore law and order to the wide-open town of Sheridan City. Before long, however, Mitchum holds the community in a grip of terror, behaving like a Law Unto Himself. So: Is the star of the film actually the villain of the piece? A last-reel plot twist effectively answers that question. Though Robert Mitchum dominates the proceedings, Man With the Gun also includes some good supporting work by Jan Sterling as Mitchum's saloon-gal wife, Henry Hull as an ageing marshal, John Lupton as an honest young farmer, and Emile Meyer as the town's leading citizen.
~ Hal Erickson, All Movie Guide