Features: High Strength ABS Body Flip-up Front & Rear Sight and Installed Top And Side Rail Set Functional Charging Handle & Bolt High Strength Polycarbonate Gearbox With Quick Change Spring System 8mm Metal Bushings Includes 8.4v Battery and Wall Charger Specifications: Firing Modes: Semi-automatic and Full-automatic w/ functional safety Muzzle Velocity: 340 FPS w/ 0.20g BBs Magazine: 300-round hi-cap M4 mag Gearbox: Polycarbonate Gearbox (w/ quick change spring system) Inner Barrel Length: 413mm Weight: 4.5 lbs Overall Length: 26.5" in.