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INERT DEACTIVATED. American,1943 Dated, 20MM Hispano-Suiza (20x110) HS 404 Aircraft Cannon AP (Armour Piercing) Round by G.M.S. (Globe Machine and Stamping Co., Cleveland, Ohio. - O 2225 INERT DEACTIVATED. The British 20mm Hispano-Suiza (20x110) HS 404 aircraft cannon which first entered service experimentally in the Battle of Britain in 1940 arming several Supermarine Spitfires and in the Bristol Beaufighter which carried 4 of the guns internally. The gun however with its original 60 round drum feed although very effective in combat was mechanically unreliable. The gun was later modified to a belt feed which was reliable and served in many aircraft throughout WW2 including the Supermarine Spitfire, Hawker Hurricane, Westland Whirlwind, Bristol Beaufighter, Hawker Typhoon and Tempest as standard equipment or an upgrade of the Browning .303 machine gun as an effective hard hitting gun. The round was later used in the De Havilland Vampire and Gloster Meteor fighter aircraft after World War 2. This is an American made round under the Lend Lease Contract for the Royal Air Force’s Hispano HS 404 20mm aircraft cannon. The round has a brass cartridge case and is headstamped G.M.S. (Globe Machine and Stamping Co., Cleveland, Ohio) 1943 (date) 20MM M21A1. The cartridge case is fitted with an unfired brass primer that is retained by 5 stab crimps. The steel American armour piercing projectile has an unfired copper driving band and retains its original black painted finish. The price includes U.K. delivery and no licence is required to possess inert rounds in the UK if retained as part of a collection or display. O 2225 £125.00
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