Immediately after World War Two Madsen resumed designing automatic weapons and the M50 used the production techniques pioneered by the Sten and Grease Gun. A unique feature is the construction of the weapon body. The entire receiver is produced in two halves held together by a large barrel nut. When this nut is undone the short barrel is removed and the two halves of the body open up to expose the workings.
Marks and Stamps: (L side of receiver) Serial no P.S.P. (R side of receiver) MADSEN| Accession Number: 174 | Period of Use: 1950s - present |
| Type: Machine pistol/SMG | War Zones: Latin America; Indo-China; Middle East |
| Country of Origin: Denmark | Type Date: 1950 |
| Manufacturer: Dansk Industri Syndikat AS Madsen, Copenhagen | Serial Number: 8409 |
| Manufacture Date: unknown | Calibre/Ammunition: 9mm Parabellum |
| Weight: 3170g | Length Overall: 800mm |
| Cyclic Rate: 550rpm | Length Barrel: 197mm |
| Deactivation Certificate Number: DA 43730 |