In April 1942 a copy of the British Mk.II was sent to the U.S. for comparison, the British version used a slightly shorter chamber and did not have the same problems as the U.S. version of the cannon.
In April 1942 a copy of the British Mk.II was sent to the U.S. for comparison, the British version used a slightly shorter chamber. In April 1942 a copy of the British Mk.II was sent to the U.S. for comparison, the British version did not have the same problems as the U.S. version of the cannon.