Thompson M1A1 Full-Metal Body AEG High power Automatic Electric Gun Velocity 466 with 0.12g and 380with 0.20g BBs Energy: 1.21 Joule Metal body and gearbox with simulated wood grain finish Full metal gear box with reinforced steel gears and metal bushings 2-way adjustable rear sight for windage and elevation Works best with 0.20g BBs or heavier Weight: 7 lbs Length: 32 inches Includes 1 magazine Note: The battery compartment in the butt of the rifle contains a dark gray foam insert. This can be removed using a cork screw or long wood screw to accommodate SDERBAT6-MINI.