This is a great addition to your “73 lever action rifle. This “66 Loading Gate is made for you 1873. When properly installed it makes loading your “73 super easy because of the unrestricted open end. Women and young children enjoy enjoy loading up before the stage. Coyote Carson says, “it’s all about the reload on the clock. The cut out end makes a reload on the clock like spreading soft butter.” Made by SG Boogie Works