Source: ATF P 5300.11 · Curios or Relics List · Jan 1972 – Apr 20253,573 entries · 4 sections
The C&R RegisterA finding aid to the ATF Curios or Relics List, for Type 03 collectors
C&R · IV · 179

Reising M50 submachinegun

Section IV: still an NFA firearm, also a curio or relic

Official wording

ATF P 5300.11 · APRIL 2025 EDITION · SECTION IV · VERBATIM · PDF P. 86 ↗

Reising, submachineguns U.S. Model M-50, cal. .45, Harrington & Richardson Arms, Worchester, MA, USA, Pat Pending.

ATF lists cal. .45; this is the .45 ACP cartridge.

What this entry requires

  • INFOATF states no date; production was about 1941–1945.
  • INFOStill an NFA firearm; only registered examples transfer, with ATF approval (26 U.S.C. 5812, 5861).

Editorial facts · Our research

Country
United StatesBasis: outside reference ¹
Manufacturer
Harrington & Richardson, Worcester, MABasis: the ATF wording
Type
SMGBasis: the ATF wording
Action
Select-fire / autoBasis: the ATF wording
Caliber
.45 ACPBasis: the ATF wording
Made
1941–1945production; ATF states no dateBasis: outside reference ²
Service
Military

Source

Official wording
ATF P 5300.11, April 2025 edition · Section IV · PDF p. 86 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: High · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
References
  1. 1. Wikipedia, “M50 Reising” ↗, country: infobox origin United States; manufacturer Harrington & Richardson
  2. 2. Wikipedia, “M50 Reising” ↗, years: infobox production date 1941–1945
Fact tags
  • ATF the ATF wording states it.
  • REF ¹ an outside reference supports it; the number points to the list of references.
  • ESTIMATE an approximate or indirect reading, for example the production range of the base model.
  • NO CITATION we haven’t attached a reference for this fact; it’s our editorial reading, not ATF’s.
Source checked
20 October 2026: ATF’s page still lists the April 2025 edition
Corrections
None

Historical context

Reising M50 submachinegun

Image: Wikimedia Commons, “Model-50.jpg” by Curiosandrelics, CC BY-SA 3.0. Retrieved October 2026.

Summary: Wikipedia, “M50 Reising”. Text CC BY-SA 4.0.

FROM WIKIPEDIA

The .45 Reising submachine gun was manufactured by Harrington & Richardson (H&R) Arms Company in Worcester, Massachusetts, USA, and was designed and patented by Eugene Reising in 1940. The three versions of the weapon were the Model 50, the folding stock Model 55, and the semiautomatic Model 60 rifle. Over 100,000 Reisings were ordered during World War II, and were initially used by the United States Navy, Marine Corps, and the United States Coast Guard, though some were shipped to Canadian, Soviet, and other allied forces to fight the Axis powers.