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 · II · 544

Schmidt-Rubin M1911 harpoon gun conversion

Section II: curio or relic, still subject to the Gun Control Act

Official wording

ATF P 5300.11 · APRIL 2025 EDITION · SECTION II · VERBATIM · PDF P. 17 ↗

Swiss Schmidt Rubin, Model 1911, rifle made into a harpoon gun, cal. 12mm.

What this entry requires

  • INFOATF states no date; production was about 1913–1960.

Editorial facts · Our research

Low editorial confidence. Some details below couldn’t be confirmed from independent sources. The ATF wording is unaffected. About confidence

Country
Switzerland
Manufacturer
Converter not stated (M1911 rifle by W+F Bern)
Type
Other
Action
Bolt
Caliber
12mm
Made
c. 1913–1960production; ATF states no date
Service
Commercial
Search listings ↗Check a specific gunReport an error ↗

Source

Official wording
ATF P 5300.11, April 2025 edition · Section II · PDF p. 17 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: Low · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
References
  1. Wikipedia, “Schmidt–Rubin” ↗, general: Schmidt–Rubin straight-pull service rifles, 1889–1958
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

Schmidt–Rubin (base model shown for Schmidt-Rubin M1911 harpoon gun conversion)
Shown: a Schmidt–Rubin service rifle, not this harpoon-gun conversion.

Image: Wikimedia Commons, “Schmidt-Rubin-2.jpg” by Rama, CC BY-SA 2.0 fr. Retrieved October 2026.

Summary: Wikipedia, “Schmidt–Rubin”. Text CC BY-SA 4.0.

FROM WIKIPEDIA

The Schmidt–Rubin rifles were a series of Swiss Army service rifles in use between 1889 and 1958. They are distinguished by the straight-pull bolt action invented by Rudolf Schmidt and use Eduard Rubin's GP90 7.5×53.5mm and 7.5×55mm rifle cartridge.