Automatic Colt Pistol
Illustration — Rimless.380 ACP cartridge Automatic Colt Pistol (ACP) is a series of firearms cartridges designed by John Moses Browning, for use in the semi-automatic pistols he designed for Colt and Fabrique Nationale. The five cartridges were introduced between 1899 and 1908. All these cartridges are straight-sided and appear visually similar, being mostly scaled versions of each other.
Automatic Colt Pistol
Malis · This photo was taken by me with my camera. · Public domain
- Field
- pistol cartridge
VALÉORINE Encyclopedia
VALÉORINE documentary reading
Documentary summary
Illustration — Rimless.380 ACP cartridge Automatic Colt Pistol (ACP) is a series of firearms cartridges designed by John Moses Browning, for use in the semi-automatic pistols he designed for Colt and Fabrique Nationale. The five cartridges were introduced between 1899 and 1908. All these cartridges are straight-sided and appear visually similar, being mostly scaled versions of each other.
Admitted source layer · organised and presented by VALÉORINE
Note VALÉORINE
No house-authored Note is published until its assertions and sources pass the VALÉORINE evidence contract. The documentary article remains available in full while that enrichment is being consolidated.
Documentary enrichment in progress · no unsupported statement published
Reference Check
Propose documentary evidence for Automatic Colt Pistol. A contribution is never written directly as fact: identity, source, rights and evidence gates still decide.
Sign in to contribute
Documentary evidence
Evidence Panel
wikipedia incomplete · checked 25 September 2026
- Identity
- resolved
- Independent source families
- 0
- Admitted assertions
- 0
- Open conflicts
- 0
Authority files
wikidata · Q4826505 · wikipedia · Automatic Colt Pistol
In this article
ACP cartridges
ACP cartridges
Other than the size, the main difference is that.25 ACP,.32 ACP, and.38 ACP are semi-rimmed and headspace on the rim, whereas.380 ACP and.45 ACP are rimless and headspace on the mouth of the case.
• Illustration — Semi-rimmed.38 ACP cartridge The five cartridges are primarily known by their caliber in inches, but sometimes (particularly in Europe) the metric dimensions are used, in which case both the caliber and case length are specified. They are: •.25 ACP (6.35×16mmSR) – 1905 •.32 ACP (7.65×17mmSR) – 1899 •.380 ACP (9×17mm) – 1908 •.38 ACP (9×23mmSR) – 1900 •.45 ACP (11.43×23mm) – 1905
History
History
Colt has manufactured several self-loading pistols. The first was the Colt M1900 made from 1900 to 1902 exclusively for the.38 ACP. The Colt Model 1903 Pocket Hammer was manufactured for the same.38 ACP cartridge from 1902 to 1928. The M1905 military pistol was manufactured for the.45 ACP cartridge from 1905 to 1912. The M1905 was replaced by the military M1911 pistol which remained in production until 1970. The Colt Model 1903 Pocket Hammerless pistol was manufactured for the.32 ACP from 1903 to 1941 and as the Model 1908 for the.380 ACP from 1908 to 1941. The Colt Model 1908 Vest Pocket pistol was manufactured for the.25 ACP from 1908 to 1941.
Primary material
Documents and archives
reference work
- “Automatic Colt Pistol”, English Wikipedia, consulted as further reading
Reputable secondary · Wikipedia
authority record
- Wikidata, structured authority record Q4826505: Automatic Colt Pistol
Unverified · Wikidata
Citations
References
Each reference names the institution holding it, so a reader may go to the document itself.
reference work
Partially resolvedauthority record
Unverified
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 14 August 2026.
Elsewhere in Militaria
6,095 published records in this field, each with its sources named.
- Austen submachine gunTerminology
- autocannonTerminology
- AutoMagTerminology
- Automatgevär m/42Terminology
- automatic firearmTerminology
- automatic grenade launcherTerminology
- automatic revolverTerminology
- automatic rifleTerminology
Best supported in this field
For owners
Own an object connected with Automatic Colt Pistol?
A specialist will read what you send and tell you what the house can establish, what it cannot, and whether the object is suited to sale. There is no charge and no obligation. The object stays with you throughout; nothing is shipped to us unless it is arranged in writing beforehand.