"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

Trump Atf Reforms F
Trump Atf Reforms F

How the Trump Administration is Reforming the ATF

After more than a year of review, the DOJ, and its sub-agency, the ATF, released 34 notices of final and proposed rules to eliminate infringements on Americans’ Second Amendment rights.

A Tale of Two Grips: Building Beyond the First Shot

Every shooter has two grips living inside them, and most never realize it until they are exposed by a timer.

Roni Corporation Establishes U.S.-Based Manufacturing

Roni Corporation—designer and manufacturer of the Micro Roni, PDW-style pistol-to-carbine conversion kits and other firearm accessories—has established U.S.-based operations and manufacturing in Houston, Texas.

PenFed Credit Union Reports Strong Q1 Growth in 2026

Continuing its record of positive growth over the last several years, NRA partner PenFed Credit Union reported increases in capital and liquidity, earning growth and credit quality through the first quarter of 2026.

I Have This Old Gun: Model 1884 Trapdoor Springfield

The U.S. military's first official breechloading service rifle was the Trapdoor Springfield, and of the line of guns that saw use throughout the late 19th century, one of the most refined was the Model 1884 Trapdoor.

A Retro Python: The Pietta Blacktooth Revolver

As the company did with the original Colt Single Action Army, Pietta sought to reproduce the Colt Python as closely to the original as possible with its new Blacktooth revolver.

Interests



Get the best of American Rifleman delivered to your inbox.