Skip to main content
Rock Island Auction Company
AuctionsConsignmentBlogFAQNewsAbout Us
Create Account
Login
AuctionsConsignmentBlogFAQNews & EventsAbout Us
Login
Create Account

History Lives Here

Rock Island Auction Company
1-309-797-15001-800-238-8022[email protected]
RIAC Rock Island
7819 42nd Street West
Rock Island, Illinois 61201, USA
8:00am - 5:00pm, Mon - Fri
RIAC Bedford
3600 Harwood Road
Bedford, Texas 76021, USA
8:00am - 5:00pm, Mon - Fri
Navigation
  • Auctions
  • Consignment
  • Blog
  • FAQ
  • News
  • About Us
More Info
  • Terms & Conditions
  • Privacy Policy
  • Job Postings & Careers
  • Contact
  • Order a Catalog
© 2025 Rock Island Auction Company. RIAC believes that this website is accessible to the widest possible audience pursuant to the guidelines of the Americans with Disability Act. Click here for more information.
Healthcare Transparency in Coverage.
  • Auction Catalog #53
  • Lot #1788
Lot #1787
Lot #1789

Lot 1788: Marlin Firearms Co UD-42 Rifle 9 mm Luger

WWII Fully Automatic "United Defense Supply Company" Model UD-42 Submachine Gun

Auction Location: Rock Island, IL

Auction Date: September 10, 2011

Lot 1788: Marlin Firearms Co UD-42 Rifle 9 mm Luger

WWII Fully Automatic "United Defense Supply Company" Model UD-42 Submachine Gun

Auction Location: Rock Island, IL

Auction Date: September 10, 2011

Estimated Price: $5,000 - $8,000
Price Realized:
Login to view
Login to view

WWII Fully Automatic "United Defense Supply Company" Model UD-42 Submachine Gun

Manufacturer: Marlin Firearms Co
Model: UD-42
Type: Rifle
Gauge: 9 mm Luger
Barrel: 12 inches round
Finish: parkerize
Grip:
Stock: walnut
Item Views: 5964
Serial Number:
Catalog Page: 142
Class: Class III
Description:

This is a very nice example of a fairly scarce and desirable WWII SMG as manufactured by the Marlin Firearms company for the United Defense Supply Company. This actual SMG was designed and patented by Carl Swebilius founder of the High Standard Firearms company, who in turn had the Marlin Firearms company actually produce the SMG for the UDS company. It was actually designed/developed in 1941 but was not actually produced until 1942, hence the later model number of "UD-42". They were originally intended as a substitute for the Thompson SMG, but by the time they actually got into production, the Thompson/Auto-Ordnance company caught up with their back orders and the intended orders for this SMG never materialized in any sizeable quantity. It is estimated that total production was approximately 15, 000 with a large quantity being used in the Far East and Philippines. They function in a blow-back type operation that uses a 20 round Thompson SMG magazine. There are two unique features of this weapon, one is that it does have a hold-open catch, that holds the bolt open after the last round is fired. The other is that the right side of the weapon has a sliding cocking handle almost identical to the cocking handle on the FN-FAL rifles. The left side of the receiver has full factory markings along with the "UD-42" model number with the right side having the full/and semi-auto markings. It has a fixed front sight with a very interesting rear sight that actually sits on top of a shaft that raise out of the rear of the receiver, which is fully adjustable for windage and elevation. These models appear to be a very robust weapon being machined entirely out of steel with a heavy driving spring inside the rear receiver. It has a vertical walnut front pistol grip mounted under the barrel in front of the magazine well, with a walnut buttstock and steel buttplate. The left side of the buttstock has a small aluminum label affixed to it which reads; "PROPERTY OF CITY OF YORKVILLE, ILL. NO 00054". This SMG is complete with one twenty round Thompson stick magazine and two, twenty round Thompson stick magazines that have been brazed together, which is correct for this weapon. As noted this is a fully transferable, fully automatic SMG that is listed on the ATF Form 4 along with the ATF transfer tax stamp.

Rating Definition:

Very fine overall with 90% of a light gray parkerized finish, with wear on the edges and high spots overall from use and handling. The barrel retains 80% plus of it's original blued finish with some spotting and light pin-prick pitting in the left front side of the barrel. The walnut fore grip and butt stock show considerable light handling marks and gouges from field use with the lower toe area of the butt stock having been broken off and reglued at some time.



Customer Product Questions

There are currently no customer product questions on this lot

    Related Items

    Lot #226: H&R Model 50 Reising, Class III/NFA C&R Fully Transferable

    Lot #1358: Daniel Defense DD5 Semi-Automatic Rifle with Box

    Lot #1: New Haven Arms Company Henry Lever Action Rifle

    Lot #724: U.S. International Business Machines Corp. M1 Carbine

    Lot #59: Massachusetts Arms Maynard Model 1873 Improved Target

    Lot #1201: U.S. International Business Machines Corp. M1 Carbine