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 · 230

Colt U.S. Bicentennial Python

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. 8 ↗

Colt, United States Bicentennial Commemorative, Python revolver, cal. .357.

What this entry requires

  • ATF REQUIRESYour firearm is this edition: “United States Bicentennial Commemorative”
  • INFOATF states no date; production was about 1976.

Editorial facts · Our research

Country
United States
Manufacturer
Colt's Patent Fire Arms Mfg. Co.
Type
Pistol
Action
Other
Caliber
.357 Magnum
Made
1976production; ATF states no date¹²
Service
Commercial
Search listings ↗Check a specific gunReport an error ↗

Source

Official wording
ATF P 5300.11, April 2025 edition · Section II · PDF p. 8 ↗ · 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. collectorsfirearms.com ↗, years: Bicentennial 3-gun set (Python, SAA, Dragoon), made in 1976; 1776 sets
  2. collectorsfirearms.com ↗, years: Colt 1976 U.S. Bicentennial set includes a Colt Python
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

Colt Python (base model shown for Colt U.S. Bicentennial Python)
Shown: the base Colt Python, not the U.S. Bicentennial commemorative.

Image: Wikimedia Commons, “Colt-Python.jpg” by The original uploader was Jeff Dean at German Wikipedia., Attribution. Retrieved October 2026.

Summary: Wikipedia, “Colt Python”. Text CC BY-SA 4.0.

FROM WIKIPEDIA

The Colt Python is a double action/single action revolver chambered for the .357 Magnum cartridge. It was first introduced in 1955 by the Colt's Manufacturing Company.