Marlin UD-42 from the Dutch Resistance

Published on January 11, 2018
Duration: 7:41

This guide details the field stripping process for the Marlin/United Defense UD-42 submachine gun, as demonstrated by Ian McCollum. It covers the basic steps to separate the major components for cleaning and maintenance. The process is described as straightforward, involving a single disassembly lever.

Quick Summary

The Marlin/United Defense UD-42 is a 9mm open-bolt, blowback-operated submachine gun known for its high rate of fire (approx. 1000 RPM) and unique doubled 20-round magazines. Originally designed by Gus Swebilius for High Standard, it was manufactured by Marlin for United Defense Supply Corp. and later distributed by the OSS/SOE to European resistance groups during WWII.

Chapters

  1. 00:00Introduction to the UD-42
  2. 00:48Production History and Dutch Order
  3. 01:40Manufacturing Challenges
  4. 03:10OSS and SOE Service
  5. 04:22External Features and Sights
  6. 05:38Disassembly and Internal Mechanics

Frequently Asked Questions

What is the Marlin/United Defense UD-42?

The Marlin/United Defense UD-42 is a 9mm open-bolt, blowback-operated submachine gun designed by Gus Swebilius. It was produced by Marlin under contract for United Defense Supply Corp. and is known for its high rate of fire and unique doubled magazines.

Why was the UD-42 produced by Marlin?

High Standard, the original designer, couldn't produce the UD-42 due to other contracts. United Defense Supply Corp. licensed the design and subcontracted manufacturing to Marlin, which faced challenges with drawings and retooling.

How was the UD-42 used during World War II?

After the fall of the Dutch East Indies, the 15,000 produced UD-42s were assigned to the OSS and SOE. They were distributed to resistance groups across occupied Europe, including Greece, Norway, France, and Holland.

What are the key mechanical features of the UD-42?

The UD-42 operates via an open-bolt, blowback mechanism. It features a heavy bolt, a relatively small recoil spring, and a high rate of fire (around 1000 rounds per minute). It also has a fire selector for safe, semi-auto, and full-auto modes.

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