The rifle Horn uses to such deadly effect in the film is an original Winchester Model 1876 in .45-60 caliber, fitted with a custom tang sight. Manufactured from 1877-1894, the Model '76 was an obsolete arm by the turn of the century, when the events of the story take place. All the available historical sources state that Horn actually used a .30-30 Winchester Model 1894 for his controversial activities as a "stock detective" in Wyoming. Horn gave this rifle to rancher C.B. Irwin not long before Horn's execution on November 20, 1903. It resides today in the collection of the National Cowboy Hall of Fame in Oklahoma City.