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 · 125

Colt Ace, 1931–1947

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. 5 ↗

Colt, from 1931 to 1947, S/N range from 1 to 10935 including those marked "UNITED STATES PROPERTY" on the right side of the frame.

ATF’s line omits the model name; the dates and S/N range match the Colt Ace entries.

What this entry requires

  • ATF REQUIRESYour serial number is one ATF listsATF: “S/N range from 1 to 10935 including those marked "UNITED STATES PROPERTY" on the right side of the frame”
  • ATF REQUIRESMade 1931–1947 (ATF’s dates)ATF: “from 1931 to 1947”

Editorial facts · Our research

Country
United States
Manufacturer
Colt's Patent Fire Arms Mfg. Co.
Type
Pistol¹
Action
Semi-auto
Caliber
Not stated
Made
1931–1947
Service
Military
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Source

Official wording
ATF P 5300.11, April 2025 edition · Section II · PDF p. 5 ↗ · 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, “Colt Ace” ↗, type: infobox type Semi-automatic pistol
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

NO VERIFIED IMAGE AVAILABLEWe show only freely licensed images verified to depict this model. None has been found yet.

Summary: Wikipedia, “Colt Ace”. Text CC BY-SA 4.0. Retrieved October 2026.

FROM WIKIPEDIA

The Colt Ace or Colt Service Model Ace is a Colt Model 1911-derived semi-automatic firearm chambered for the .22 Long Rifle cartridge instead of .45 ACP. It was created in 1931 and produced through 1947 to allow inexpensive and low-recoil sub-caliber training while maintaining the feel of the military Model 1911 pistol.