For Crusader Mk.III, Cromwell Mk.I, Churchill Mk.III, and Churchill Mk.IV. From AFV Club, availalbe from
Product
57mm OQF 6 Pdr. Mk.V L/50 barrel
Product
For Crusader Mk.III, Cromwell Mk.I, Churchill Mk.III, and Churchill Mk.IV. From AFV Club, availalbe from