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 18” features a short overall length for compact handling along with enhanced ballistic performance due to its longer barrel. Ambidextrous controls work in concert with a reversible case ejection system for maximum adaptability. The result is a 5.56 that combines portability with potent performance.