aeg electric full scale metal gearbox m4 sr16 series rifle m16a4 m4a1 carbine airsoft gun fps-350 w/ adjustable stock, removable carrying handle, ac charger and rechargeable battery(Airsoft Gun) AEG Electric Powered, Metal Gearbox, Full Metal Barrel and Magazine Solid Plastic and Metal Construction, 1:1 Full Scale. Fully Auto and Semi Shooting Mode New Version High Torque Spring M120 Full Metal Gearbox. Removable Carrying Handle, Integrated Rail System, Adjustable Sight FPS-350 (Use 0.2g BBs), Overall Length: 34 Inches