Developed by the Ordnance dept and Vickers but manufactured by BSA for use in World War II.
The 2 Pounder was a heavy gun and was emplaced, thus it could not be moved swiftly.
It had a semi-automatic breech mechanism and telescopic sights.
The gunner was provided with a seat and a full fixed shield protected the crew.
A 1.57inch (40mm) armor piercing round was fired, capable of penetrating 1.65inches (42mm) of armor at 1000yards (914m).
For WWII a revised armor piercing round was issued for the 2 pounder, and a bolt on muzzle adaptor which tapered the bore, thus increasing muzzle velocity significantly and therefore range and penetration.