Springfield, Hellion, Semi-automatic Rifle, Bullpup, 223 Remington/556NATO, 20" Hammer Forged Barrel with Bayonet Lug, 1:7 Twist, Springfield Armory Muzzle Brake, Matte Finish, Black, Strike Industries Simple Featureless Grip, Fixed Stock, Front/Rear Flip Sights, 2-Position Short Stroke Gas Piston, Ambidextrous Safety, Ambidextrous Charging Handle, MLOK Handguard Reversible Ejection System, 10 Rounds, 1 Gen3 Magpul PMAG