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 · III · 032

Coston line-throwing gun, with kit

Section III: removed from the NFA, curio or relic under the GCA

Official wording

ATF P 5300.11 · APRIL 2025 EDITION · SECTION III · VERBATIM · PDF P. 24 ↗

Coston Supply Co., Coston Line Throwing Gun, cal. .45-70, S/N 447; determination applies only when included as an integral part of its accompanying accessory kit.

Applies only when the gun is kept with its accessory kit.

What this entry requires

  • ATF REQUIRESConfigured as the ATF wording states: “determination applies only when included as an integral part of its accompanying accessory kit”
  • ATF REQUIRESYour serial number is one ATF listsATF: “S/N 447”
  • INFOATF states no date; production was about 1880–1940.

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
United States
Manufacturer
Coston Supply Co.
Type
Other
Action
Other
Caliber
.45-70
Made
S/N 447 only · c. 1880–1940production; 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 III · PDF p. 24 ↗ · 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
None attached yet
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, “Line thrower”. Text CC BY-SA 4.0. Retrieved October 2026.

FROM WIKIPEDIA

A line thrower is a device that casts a line to a remote position. It is used in rescues as well as marine operations. A line thrower may employ a variety of launching methods including guns, rockets, and pneumatics.