Manufacturer: Classic Army FPS Range: 375-400 Specifications: Length: 654mm - 756mm (Adjustable) Weight: 3008g Inner Barrel: 304mm Magazine Capacity: 350rd Hi-Capacity. Works with Matrix, G&G, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Magazines Muzzle Velocity: 375 - 400 FPS (Measured with 0.20g BBs) Thread Direction: 14mm Negative Gearbox: Ver 2 Full Metal, Fully Upgradeable Motor: Long Type Fire Modes: Semi/Full-Auto, Safety Battery: Lipo stick type battery (Up to 11.1v) recommended (Battery not included. Wired to handguard with standard Deans connector) Hopup: Yes, Adjustable Package Includes: Gun, Magazine, Manual