Tanker's Tuesday: WW2-era 6-pounder Anti-Tank

The 6 Pounder was designed primarily as an anti-tank gun but the tank version only differed in having a lug on the breech ring and the first guns produced were intended to be mounted on tanks. The designers of the A.20 tank intention was to mount a gun heavier than the 2 Pounder, the 6 Pounder was reported in January 1940
British 6 lb Anti tank gun