Weight: 10lbs Inner Barrel: 409mm Magazine Capacity: 450rd Hi-Capacity. Works with Matrix, G&G, Tokyo Marui and other compatible AK Series Airsoft AEG Magazines Muzzle Velocity: 430~440 FPS (Measured with 0.20g BBs) Thread Direction: 14mm Negative Gearbox: Ver 3 Full Metal, Fully Upgradeable Motor: Short Type Fire Modes: Semi/Full-Auto, Safety Battery: 9.6v Small Butterfly Type recommended (Deans)