"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

9X18 Makarov
9X18 Makarov

Shooting Surplus: Finding Affordable Mil-Surp Ammo in 2026

Today, the market for mil-surp ammo is vastly different than it was even just a few years ago. If you're a military-surplus collector and shooter, what should you look for in 2026? Here's our guide.

Colt Electro-Optics Introduces New Red Dots & Magnifier

No stranger to rebirth, Colt has recently spun off an optics division to make sure that, in a world where optics are considered to be standard equipment, a fully kitted-out gun can be all-pony.

What This Huge NFA Ruling Means for Gun Owners

The recent ruling in Jensen v. ATF and the subsequent lack of an appeal by the U.S. Department of Justice has left many gun owners with questions about purchasing NFA items. Here is some guidance.

Gun of the Week: Smith & Wesson Model 386 Night Guard

In partnership with Lipsey's, Smith & Wesson recently re-introduced two of its classic Night Guard revolvers, the Models 386 and 396, which are chambered for the .357 Magnum and .44 Special, respectively.

The Armed Citizen® Aug. 14, 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.

A (Slightly Confusing) History of Colt's Police Positive Revolver

For one of the most popular law-enforcement revolvers ever made, the history of the Colt Police Positive isn't nearly as linear as one would think it'd be.

Interests



Get the best of American Rifleman delivered to your inbox.