Springfield Hellion, Semi-automatic Rifle, Bullpup, 223 Remington/556NATO, 16 Hammer Forged Barrel, 1:7 Twist, 4 Prong Flash Hider, Matte Finish, Olive Drab Green, BCM MOD 3 Grip, 5-Position Adjustable Stock with Cheek Riser, Front/Rear Flip Sights, 2-Position Short Stroke Gas Piston, Ambidextrous Safety, Ambidextrous Charging Handle, MLOK Handguard, Reversible Ejection System, 30 Rounds, 1 Gen3 Magpul PMAG HL916556G Redefining perceptions of semi-automatic 5.56 performance, the Hellion from Springfield Armory represents a radically unique and innovative approach to firearms design. Featuring a bullpup configuration where the action is located behind the trigger, the Hellion features an overall length of just 28.25-inches while still possessing a 16" barrel. The Hellion sports ambidextrous controls that work in concert with a reversible case ejection system, allowing it to be easily fired from either shoulder. The result? A 5.56 that combines portability with performance.