SAS - astonished they were still planning "Primary armament was to become an array of 6 x 12.7mm (.50 caliber) machine guns mounted in the wings (a reduction from the 8 x 12.7mm machine guns in the original P-47 Thunderbol)" so late in the war - almost all Erupean fighters had switched to a mix of MG's and Cannon by about 1941. MG's just didn't hack it