C&R · IV · 105
Steyr-Solothurn S1-100 (MP 34) machine pistol
Section IV: still an NFA firearm, also a curio or relic
Official wording
ATF P 5300.11 · APRIL 2025 EDITION · SECTION IV · VERBATIM · PDF P. 84 ↗
German, Steyr-Solothurn, cal. 9mm, machine pistol.
What this entry requires
- INFOATF states no date; production was about 1929–1940.
- INFOStill an NFA firearm; only registered examples transfer, with ATF approval (26 U.S.C. 5812, 5861).
Editorial facts · Our research
- Country
AustriaBasis: outside reference ³- Manufacturer
- Waffenfabrik Steyr (sold by Steyr-Solothurn Waffen AG)Basis: outside reference ²
- Type
- SMGBasis: the ATF wording
- Action
- Select-fire / autoBasis: the ATF wording
- Caliber
- 9mmBasis: the ATF wording
- Made
- c. 1929–1940production; ATF states no dateBasis: outside reference ¹
- Service
- Military
Source
- Official wording
- ATF P 5300.11, April 2025 edition · Section IV · PDF p. 84 ↗ · 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, “MP 34” ↗, years: production 1929–1940
- 2. Wikipedia, “MP 34” ↗, maker: Rheinmetall took control of Waffenfabrik Steyr; guns were sold via Zürich-based Steyr-Solothurn Waffen AG
- 3. Wikipedia, “MP 34” ↗, country: manufacturer Waffenfabrik Steyr (Austria)
- 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
- 3 changes · see below
Correction history
- Data-trust reviewYears shown as: none → Not stated. MP 34 production 1929–1940 by Waffenfabrik Steyr; Steyr-Solothurn Waffen AG of Zürich was the sales company
- Data-trust reviewYears: 1930–1940 → 1929–1940. MP 34 production 1929–1940 by Waffenfabrik Steyr; Steyr-Solothurn Waffen AG of Zürich was the sales company
- Data-trust reviewMaker: Waffenfabrik Steyr; Solothurn → Waffenfabrik Steyr (sold by Steyr-Solothurn Waffen AG). MP 34 production 1929–1940 by Waffenfabrik Steyr; Steyr-Solothurn Waffen AG of Zürich was the sales company
Historical context
Image: Wikimedia Commons, “Mp34 bayonet mags.JPG” by Londonclanger at English Wikipedia, CC BY-SA 3.0. Retrieved October 2026.
Summary: Wikipedia, “MP 34”. Text CC BY-SA 4.0.
FROM WIKIPEDIA
The MP34 is a submachine gun (SMG) that was manufactured by Waffenfabrik Steyr as Steyr-Solothurn S1-100 and used by the Austrian Army and Austrian Gendarmerie and subsequently by units of the German Army and the Waffen-SS in World War II. An exceptionally well-made weapon, it was used by some forces well into the 1970s.