Country of Origin : Great Britain Role : Machinegun In-Service Date : October 1914 Manufacturer : Birmingham Small Arms Co. Number Produced : 200,000+ Operation : Gas Rotating Bolt Automatic Feed : 47 or 97 round overhead drum magazine Cartridge Name : .303 British Mk.VII Ball Cartridge Size : 7.7mm x 56mm Cartridge Total Weight : grams Bullet Weight : 11.4 grams Weapon Length : 128.5 cm Barrel Length : 66.7 cm Empty Weight : 11.79 kg Combat Weight : 12.15 kg Muzzle Velocity : 745 meters per second Practical Rate of Fire : rounds per minute Cyclic Rate of Fire : 450 - 500 rounds per minute Effective Range : 800 meters Scope Types : None Bayonets : None Grenades : None Other : None