Redefining perceptions of semi-automatic 5.56 performance, the Hellion from Springfield Armory represents a radically unique and innovative approach to firearms design. Featuring both compact dimensions and capable downrange performance, the Hellion with 18″ barrels offer bullpup fans even more options. With the action located behind the trigger, the 5.56mm Hellion offers extremely compact dimensions even with these longer-barreled new variants. Fully ambidextrous controls and reversible ejection round out the package for maximum adaptability.