Springfield Hellion, Semi-automatic, Bullpup, 223 Remington/556NATO, 16 Hammer Forged Barrel, 1:7 Twist, 4 Prong Flash Hider, Matte Finish, Flat Dark Earth, Single Point Sling, Crimson Trace CTS-103 Red/Green Dot, 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, 10 Rounds, 2 Magazines HL916556FLC-GU25 The Hellion from Springfield Armory 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 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. The result is a 5.56 that combines portability with potent performance.