"M42" UD (United Defense) Submachine Gun

by
posted on April 24, 2014
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
qathompson1.jpg

Q. In a history of the Office of Strategic Services (OSS) I was reading, the author made reference to procurement of the M42 submachine guns, but did not explain any further. Can you tell me what an M42 submachine gun is? Was this gun ever issued to conventional American or Allied troops?

A. No M42 submachine guns were issued to the American Armed Forces during the war, but it was supplied to several allied countries during the war, and it was an item of issue to the OSS for use in various clandestine-related operations. The M42 was invented by Carl Swebilius, who was affiliated with the firm of High Standard. High Standard developed the prototype and produced a few early versions of the gun, but the Marlin Firearms Co. manufactured approximately 15,000 of these guns.

Most were chambered in 9 mm, but a few .45 ACP versions were made as well. The M42 could accept a conventional box magazine and also had the ability to be used with staggered side-by-side magazines. Government records indicate that 2,405 9 mm Marlin MD 42 submachine guns were airdropped in France from January to October of 1944 for use by OSS-related resistance operations.

The MD 42 was an unremarkable submachine gun with no outstanding virtues or glaring vices. Since it was not an issue item to U.S. armed forces, it is a little- known arm today and extremely few examples survive.

-Bruce N. Canfield

Originally published September, 2006

Latest

Roy Weatherby Velocity Web
Roy Weatherby Velocity Web

The Case For Velocity

Although the effects of a bullet's terminal performance had been thoroughly studied by 1955, ammunition pioneer Roy Weatherby sought to prove velocity trumps mass and, as a result, built a reputable business that continues to advance today.

Preview: Kriss Vector CRB Gen 3

The third generation of Kriss’ distinctively shaped Vector line was introduced earlier this year, with the company offering the platform in carbine (CRB), large-format pistol (SDP) and short-barreled rifle (SBR) formats ...

Staccato 2011 HD C3.6: Shrinking The 2011

Following the release of its HD model, which was designed to accept Glock-pattern magazines, Texas-based firearm maker Staccato announced it had developed a smaller, carry-ready variant: the 2011 HD C3.6.

Preview: Heathen Systems Assaulter Bipod Combo

The Heathen Systems Assaulter Bipod features a detachable-leg design that is ultra-low-profile when stowed and requires minimal space on an existing Picatinny rail.

Gun Of The Week: Walther Arms PDP Pro-X PMM Compact

Within Walther Arms' line of Performance Duty Pistols, the Pro-X PMM stands out, thanks to a number of features. We head to the range to see exactly how these upgrades and enhancements impact the design.

The Armed Citizen® Oct. 31, 2025

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Interests



Get the best of American Rifleman delivered to your inbox.