The new 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.Features: CALIBER: 5.56x45mm NATO (.223 REM) COLOR: Black BARREL: 16" CMV MeloniteA(R) 1:7 FRONT SIGHT: Integrated Flip-Up Elevation Adjustable REAR SIGHT: Integrated Flip-Up w/ 5-Position Aperture Windage Adjustable BOLT CARRIER GROUP: Proprietary MeloniteA(R) GAS SYSTEM: 2-Position Adjustable Short Stroke Piston HANDGUARD: Polymer M-LokA(R) STOCK: 5-Position Adjustable w/ Cheek Riser MUZZLE DEVICE: 4-Prong Flash Hider CHARGING HANDLE: Ambidextrous Non-Reciprocating SAFETY SWITCH: Ambidextrous GRIP: BCMGUNFIGHTER(TM) Mod 3 MAGAZINES: (1) 30-Round Magpul PMAG Gen M3 WEIGHT: 8 lbs LENGTH: 28.25" - 29.75"