The M-4 RIS Metal Gear Pistol is a Full Scale Replica of a M-4 Carbine RIS Rifle.  Features an ALL METAL body, METAL Gearbox, Rechargable Battery, Charger, and Speed Loader.  Shoots in Semi-Automatic or FULL Automatic.  Shoots at 425 FPS and can use the Heavy Duty 20 Gram Airsoft BB's