known as Boarhound in its limited British service, was stopped after 30 units were built. A project for a tank destroyer armed with the M1—the 57 mm Gun Motor Carriage T49—was cancelled after a single pilot vehicle was built. Similarly, the wheeled 57 mm Gun Motor Carriage T44, based on Ford 4×4 ¾ ton cargo carrier chassis, was cancelled after brief testing. Ammunition Ammunition was of the fixed type made up of projectile - with a tracer in the base - a charge in a brass cartridge and a percussion primer. A drill round made of weighted wood was also used. Propellant was cordite or NH, the latter being more compact than cordite as cordite had a piece of packing between the propellant and base of the projectile. Performance The zone of dispersion of the gun was 90% in at . AP in use as a tank gun, penetration was 81 mm (for Mark 3 gun) and 83 mm (Mark 5) at 500 yards and target at 30°. Users (in WW2 and in Korea) - As 57 mm Infantry Gun (Fodfolkskanon) : Arab Legion : Received 117 from the U.S. in 1948–49. Kingdom of Yemen See also Caliber#Pounds as a measure of cannon bore Weapons of comparable role, performance and era 57 mm anti-tank gun M1943 (ZiS-2) : Soviet anti-tank gun 5 cm Pak 38 : German anti-tank gun Notes References Bibliography External links Development, Performance, Production of the 6pdr AT Gun Anthony G Williams - The 6 pdr 7cwt and the Molins gun US M-1 57 mm Anti-tank gun at Militaria: Weapons Armour penetration table Photo gallery at Tanxheaven.com TO&E antitank company Photographic album of the restoration of a WWII 6-Pounder Mk V Tank guns of the United Kingdom Tank guns of the United States World War II anti-tank guns 57 mm artillery Anti-tank guns of the United Kingdom Anti-tank guns of the United States Weapons and ammunition introduced in 1941 World War II field artillery World War II artillery of the United Kingdom World War II tank guns