C&R · II · 011
Astra Model 1921 (400), Esperanza y Unceta slide
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. 2 ↗
Astra, Model 1921 (400) semiautomatic pistols having slides marked Esperanzo Y Unceta.
What this entry requires
- ATF REQUIRESYour firearm carries the marking “marked Esperanzo Y Unceta”
- ATF REQUIRESConfigured as the ATF wording states: “having slides”
- INFOATF states no date; production was about 1921–1926.
Editorial facts · Our research
- Country
SpainBasis: no citation - Manufacturer
- Esperanza y Unceta, GuernicaBasis: the ATF wording
- Type
- PistolBasis: the ATF wording
- Action
- Semi-autoBasis: the ATF wording
- Caliber
- 9mm LargoBasis: no citation
- Made
- Esperanza y Unceta markings · c. 1921–1926production; ATF states no dateBasis: outside reference ¹²
- Service
- Military
Source
- Official wording
- ATF P 5300.11, April 2025 edition · Section II · PDF p. 2 ↗ · 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, “Astra-Unceta y Cia SA” ↗, years: Wikipedia: founded 1908 as Esperanza y Unceta, "renamed to Unceta y Compañía in 1925" (the slide marking period)
- 2. Wikipedia, “Astra 400” ↗, years: Wikipedia: infobox production date 1921–1950
- 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
Image: Wikimedia Commons, “Left side of Astra 400 pistol.jpg” by V-Hantarex, CC BY 4.0. Retrieved October 2026.
Summary: Wikipedia, “Astra 400”. Text CC BY-SA 4.0.
FROM WIKIPEDIA
The Astra modelo 400 was a Spanish service pistol produced by weapons manufacturer Astra-Unceta y Cia SA as a replacement for the Campo-Giro 1913/1916, which had also been chambered in 9mm Largo. It was the standard issue sidearm in the Spanish Army during the Spanish Civil War and also saw service in Germany during World War II.