The Hiviz PM2003, also known as the HiViz TriComp, is a premier device designed with the basic principles of triangulation, pointing, and eye/hand coordination in mind. One of its standout features includes interchangeable litepipes that don\'t require any tools to modify. The package includes three triangular and three round litepipes. These come in a variety of colors and heights to suit your needs. In addition to these features, the Hiviz PM2003 comes with a superbly sized carrying case. The dimensions of this case are perfect for a shell vest or choke tube box. This device is highly compatible and designed to fit most vent ribbed shotguns seamlessly.