Training Manual, 50 Caliber M2 Aircraft Machine Gun
This is an original WWII-era training manual for the General Motors-manufactured 50 Caliber M2 Aircraft Machine Gun. This manual was used in the training of armorers in the US Army Air Force and the US Navy. The M2 was installed across most fighter and bomber aircraft of WWII.
This 79-page manual describes the gun and its subassemblies, service and maintenance, and parts list. It is in reasonably good condition given its age. Contains some pencil mark-ups.