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 · 111

High Standard HD silenced pistol (OSS)

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. 85 ↗

High Standard, USA Model HD, cal. .22 1r, pistols, originally equipped with silencers for issue to the OSS and other military agencies, S/N range 109110-153890.

ATF lists cal. .22; this is the .22 Long Rifle cartridge. ATF prints "cal. .22 1r", a misprint for .22 LR (long rifle).

What this entry requires

  • ATF REQUIRESOriginal as the ATF wording requires: “originally equipped with silencers for issue to the OSS and other military agencies”
  • ATF REQUIRESYour serial number is one ATF listsATF: “S/N range 109110-153890”
  • INFOATF states no date; production was about 1944–1945.
  • INFOStill an NFA firearm; only registered examples transfer, with ATF approval (26 U.S.C. 5812, 5861).

Editorial facts · Our research

Country
United States¹
Manufacturer
High Standard Manufacturing Co.
Type
Pistol
Action
Semi-auto²
Caliber
.22 LR
Made
S/Ns 109110–153890 · c. 1944–1945production; ATF states no date³
Service
Military
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Source

Official wording
ATF P 5300.11, April 2025 edition · Section IV · PDF p. 85 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: Medium · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
References
  1. Wikipedia, “High Standard HDM” ↗, country: infobox origin United States
  2. Wikipedia, “High Standard HDM” ↗, action: blowback, semi-automatic pistol with an integral silencer
  3. modernfirearms.net ↗, years (estimate: partly supports it): 'During 1944, High Standard produced several thousands of these pistols' (model HDM; Wikipedia: first delivered 20 January 1944); end year 1945 is our estimate
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
1 change · see below

Correction history

  1. Evidence passEditorial confidence: High → Medium. Re-rated after its references were re-checked and some details couldn't be confirmed.

All corrections · How corrections work

Historical context

High Standard HD silenced pistol (OSS)

Image: Wikimedia Commons, “U.S. PISTOL MODEL H-D MS.jpg” by Springfield Armory Museum, Public domain. Retrieved October 2026.

Summary: Wikipedia, “High Standard HDM”. Text CC BY-SA 4.0.

FROM WIKIPEDIA

The High Standard HDM is an American semi-automatic pistol equipped with an integral silencer. Based on the High Standard H-D pistol, it was adopted by the Office of Strategic Services (OSS) during World War II. Because of legal concerns during wartime, full-metal-jacketed .22 LR rounds were developed for this pistol.