Chris Costa of Costa Ludus tries the US Air Force M4 ASDW GAU 5A. This is an AR rifle designed to fit in the ejection seat of U.S. planes so a pilot gets a better firearm during SERE especially when they get shot down behind enemy lines and waiting for rescue or trying to reach friendly positions... "US Air Force wanted a compact M4 to fit in a pilot’s ejection seat. Enter the GAU-5A ASDW."