The Swedish Suomi M-37/39 Submachine Gun

Published on September 13, 2017
Duration: 7:03

The Swedish Suomi M-37/39 is a licensed variant of the Finnish M-31, adapted for Swedish service. Initially chambered in 9x20mm Browning Long to match the Husqvarna m/07 pistol, it later transitioned to the more common 9mm Parabellum. Key modifications include updated sights for the new caliber and a distinctive quad-stack magazine design.

Quick Summary

The Swedish Suomi M-37/39 is a licensed variant of the Finnish M-31 submachine gun, adapted for Swedish service. It was initially chambered in 9x20mm Browning Long but later transitioned to 9mm Parabellum. Key features include a 56-round quad-stack magazine and modifications to sights and controls.

Chapters

  1. 00:00Introduction to the Swedish Suomi M-37/39
  2. 00:30Initial Caliber and Magazine Design (9x20mm)
  3. 02:12Transition to 9mm Parabellum
  4. 03:15Technical Features and Sights
  5. 03:57Controls and Barrel Design
  6. 05:10Field Stripping and Internal Components

Frequently Asked Questions

What is the Swedish Suomi M-37/39?

The Swedish Suomi M-37/39 is a submachine gun developed in Sweden as a licensed copy of the Finnish Suomi M-31. It featured several modifications for Swedish service, including updated sights and a different charging handle.

What calibers did the Swedish Suomi M-37/39 use?

Initially, the M-37 was chambered in 9x20mm Browning Long to match Swedish service pistols. By 1939, it was updated to fire the more common 9mm Parabellum, becoming the M-37/39 model.

What was unique about the magazine design of the Swedish Suomi?

The Swedish Suomi M-37/39 utilized a 56-round quad-stack 'coffin' magazine. For the 9x20mm Browning Long cartridge, the magazine was canted backward to prevent rim-lock issues with the semi-rimmed ammunition.

Who manufactured the Swedish Suomi M-37/39?

The Swedish Suomi M-37/39 submachine guns were manufactured by Husqvarna, a Swedish industrial company. The bolt is often marked with an 'H' to indicate its origin.

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