Features: Manufactured by Lancer Tactical! True 1:1 Scale, Modeled After the M4 Assault Rifle! Electric Powered (AEG) Velocity: 400 FPS w/ 0.20G BB"s Full Metal V2 Gearbox with High Performance, Long Type Electric Motor * Ported Piston Head Custom 120 Spring 6.03 mm Precision Tight Bore Copper Inner Barrel Tactical Polymer Foregrip High Capacity 300 Round Magazine * Adjustable Hop-Up System Can Fire Both Semi AND Fully Automatic Working Safety Retractable Stock Integrated Rail System * Smart Charger Recommended for ALL AEG Rifles Use High Quality Seamless Rounds, 0.20G or Heavier, to Avoid Misfires and Jams Comes with 1000 Count Lancer Tactical Extreme Precision Premium BB"s! * Length: 31", 34" (Stock Extended)