Springfield Armory Hellion Bullpup 5.56mm Rifle offers a unique design that redefines perceptions of 5.56 semi-auto performance. This Hellion Rifle features a bullpup configuration meaning the rifle length is 28.25-inches overall while sporting a 16-inch barrel. The design is portable while still delivering down range performance.Features: Caliber: 5.56x45mm NATO (.223 Rem) Barrel: 16" CMV with Melonite finish, 1:7 Front Sight: Integrated flip-up and elevation adjustable Rear Sight: Integrated flip-up with 5-position aperture and windage adjustable Bolt Carrier Group: Proprietary with Melonite finish Gas System: 2-Position adjustable, short stroke piston Handguard: Polymer M-LOK Stock: 5-Position adjustable with cheek riser Muzzle device: 4-prong flash hider Charging handle: Ambidextrous, non-reciprocating Safety switch: Ambidextrous Grip: BCMGUNFIGHTER Mod 3 Magazine Capacity: 30 PMAG Gen M3 Overall Length: 28.25" - 29.75" Weight: 8 lbsBy moving the action and magazine behind the trigger, the bullpup system reduces overall length while still offering effective downrange performance. This lightweight rifle comes standard with a polymer M-LOK handguard, 16-inch CMV barrel and 4-prong flash hider. The adjustable gas system can switch between suppressed and normal mode to easily adapt to conditions and ammunition availability. The Hellion comes completely ambidextrous with its charging handle and safety switch that work in combination with a reversible case ejection system. Other features include a BCMGUNFIGHTER Mod 3 grip, 5-position adjustable stock with cheek riser, and integrated front flip-up sights. Included is one 30-round Magpul PMAG Gen M3 magazine.