The Springfield Armory Hellion represents a radically unique and innovative approach to firearms design helping to redefine perceptions of semi-automatic 5.56mm performance. Featuring a “bullpup” configuration where the action is located behind the trigger the Hellion 20” features a short overall length for compact handling as well as a bayonet lug. The Hellion sports ambidextrous controls that work in concert with a reversible case ejection system. The result is a 5.56 that combines portability with potent performance.