"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

Smith & Wesson Night Guard revolvers
Smith & Wesson Night Guard revolvers

New for 2026: Smith & Wesson Night Guard Revolvers

Smith & Wesson brings back the Night Guard series of revolvers in .44 Special and .357 Magnum.

Battle On The Border: Pancho Villa’s Raid On America

In March 1916, Americans living in the quiet town of Columbus, N.M., suddenly found themselves attacked by Mexican bandits, and many citizens sought to arm themselves and fight back, both during the raid and afterward.

The Armed Citizen® Feb. 9, 2026

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

Swiss Armed Forces Select SIG Sauer P320s

Swiss Armed Forces select a domestically sourced SIG Sauer P320 as standard issue.

Preview: Reptilia RECC-E Carbine Stock

Versatile and exceptionally lightweight, the polymer RECC-E SR-15/M4/AR-15 Carbine Stock from Reptilia provides a constant, uniform cheek weld across a generous range of settings for length-of-pull...

The MAT-49: France's Mid-20th Century SMG

After World War II, the French military was left with a hodgepodge of leftover submachine guns. After several years, the army consolidated on a standard service rifle, the MAS-49, and a standard submachine gun: the MAT-49.

Interests



Get the best of American Rifleman delivered to your inbox.