The submitted drawings show some additional solid lines on the rifle barrel; some of these solid lines are not meant to convey actual solidly drawn lines, such as actual surface markings or ornamentation, on the rifle barrel. As is generally recognized by persons skilled in the art of preparing digital drawings, such solid lines are meant to convey the boundaries for curved surfaces on the rifle barrel. Such curved surfaces are also defined by the non-line-drawn versions, also known as solid-shaded images, disclosed in the present application's priority application, which is incorporated by reference herein. The specific color of the solid-shaded images disclosed in the priority application forms no part of the claimed design.