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 · 168

Colt Lawman Mark III, S/N J42429

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. 6 ↗

Colt, Model Lawman Mark III Revolvers, cal. .357 Magnum, S/N J42429.

What this entry requires

  • ATF REQUIRESYour serial number is one ATF listsATF: “S/N J42429”
  • INFOATF states no date; production was about 1969–1983.

Editorial facts · Our research

Country
United States
Manufacturer
Colt's Firearms
Type
Pistol
Action
Other
Caliber
.357 Magnum
Made
S/N J42429 · c. 1969–1983production; ATF states no date¹
Service
Commercial
Search listings ↗Check a specific gunReport an error ↗

Source

Official wording
ATF P 5300.11, April 2025 edition · Section II · PDF p. 6 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: Medium · Last revised 17 October 2026 (Data-trust review) · How we rate confidence
References
  1. Wikipedia, “Colt Trooper” ↗, years: MK III Lawman produced 1969 to 1983; .357 Magnum
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. Data-trust reviewEditorial confidence: Low → Medium. Re-rated after supporting references were added or re-checked.

All corrections · How corrections work

Historical context

Colt Trooper (base model shown for Colt Lawman Mark III, S/N J42429)
Shown: a Colt Trooper Mk III, not this Lawman Mk III.

Image: Wikimedia Commons, “Flickr - ~Steve Z~ - Colt Trooper MKIII .357 (14).jpg” by Stephen Z, CC BY-SA 2.0. Retrieved October 2026.

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

FROM WIKIPEDIA

The Colt Trooper is a medium frame, double-action revolver featuring a six-round cylinder, chambered for .22 Long Rifle, .22 Winchester Magnum Rimfire, .38 Special, and .357 Magnum caliber cartridges. Designed as a less expensive alternative to the upscale Colt .357 and the later Colt Python and Colt King Cobra, it was marketed to law enforcement agencies as well as civilians.