BT Gun Company carries Mayville Engineering Co./Mec reloading equipment and components, including single stage presses, press parts and accessories, powder measures and case prep tools. Available products include the MEC Sizemaster Reloader in 28 gauge, MEC 600 Jr. Mark 5 Reloader in 12 gauge, lead shot charge bars, powder bushings and the MEC E-Z Primer V for 600 Jr. and 700 presses.