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 · IV · 054

Suomi M/26 & KP/-31 submachineguns

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. 83 ↗

Finnish “Suomi” Model 26, cal. 7.65mm Parabellum, submachinegun and Model 31, cal. 9mm Parabellum, submachinegun, as originally mfd. by Oy Tikkakoski Ab, Finland, Husqvarna Vapanfabriks, Sweden, and Hispano Suiza, Switzerland, prior to 1946.

What this entry requires

  • ATF REQUIRESMade or imported as stated: “as originally mfd. by Oy Tikkakoski Ab”
  • ATF REQUIRESMade 1945 or earlier (ATF’s dates)ATF: “prior to 1946”
  • INFOStill an NFA firearm; only registered examples transfer, with ATF approval (26 U.S.C. 5812, 5861).

Editorial facts · Our research

Country
Finland
Manufacturer
Oy Tikkakoski Ab; Husqvarna Vapenfabriks; Hispano-Suiza (Switzerland)²
Type
SMG
Action
Select-fire / auto
Caliber
7.65mm Parabellum, 9mm Parabellum
Made
Before 1946¹
Service
Military
Search listings ↗Check a specific gunReport an error ↗

Source

Official wording
ATF P 5300.11, April 2025 edition · Section IV · PDF p. 83 ↗ · ATF original ↗
Entries
1 line
Verbatim check
Checked against the PDF text before every release
Editorial facts
Confidence: High · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
References
  1. jaegerplatoon.net ↗, years: Suomi M/26: 'Production: About 100 made between 1925 - 1926'; end limit is ATF's 'prior to 1946' (Wikipedia: KP/-31 production 1931–1953 continues past it)
  2. Wikipedia, “Suomi KP/-31” ↗, maker: infobox manufacturer Tikkakoski; made under licence in Sweden by Husqvarna Vapenfabriks AB (kpist m/37) and in Switzerland by Hispano-Suiza (MP 43/44)
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. Evidence passYears: 1926–1945 → 1925–1945. Jaegerplatoon.net: the M/26 was made 1925–1926

All corrections · How corrections work

Historical context

Suomi M/26 & KP/-31 submachineguns

Image: Wikimedia Commons, “Suomi submachine gun M31 1 (1).jpg” by Mbeesb, CC BY-SA 3.0. Retrieved October 2026.

Summary: Wikipedia, “Suomi KP/-31”. Text CC BY-SA 4.0.

FROM WIKIPEDIA

The Suomi KP/-31 is a Finnish submachine gun that was mainly used during World War II. It is a descendant of the M-22 prototype and the KP/-26 production model, which was revealed to the public in 1925. It entered service in Finland in 1931, and remained in use until the 1980s.