Mauser | Swedish Mauser | Mauser C96 | Maryland Route 213 | 7.92×57mm Mauser | North Carolina Highway 213 | Mauser Model 1871 | 213 (group) | 213 |
The M39 was developed by the Springfield Armory, based on the World War II–era design of the German Mauser MG 213, a 20 mm (and 30 mm) cannon developed for the Luftwaffe, which did not see combat use.