Bushmaster Predator AEG Airsoft Rifle: Heavy weight design Power source: Electric Mechanism/Action: Full/Semi-auto Velocity: 400fps (12-gram ammo) or 300fps (20-gram ammo) Caliber/Ammo: 6mm plastic BB's Magazine capacity: up to 330 rounds Material: Heavyweight polymer with metal gearbox Barrel: Smooth bore Weight: 5.75 lbs Length: 39.5" Battery type: Rechargeable NiMH Batteries included with adapter Safety: Lever DISCLAIMER: You must be 18 years old to purchase this product. The sale or shipment of this product to residents of California, Connecticut, District of Columbia, Delaware, Illinois, Michigan, Massachusetts, New Jersey, New York, North Carolina, Puerto Rico and Canada is prohibited. Check your local laws before ordering this product. We recommend the use of protective eyewear whenever using or near the use of this item.