SIG Maschinenkarabiner Modell 1930

Hello bajtársak and fellow forumdwellers,
Today I present to you a weapon that has been circulating the forum for a few years now, the SIG Maschinenkarabiner Modell 1930 or MK1930 as I will refer to it from now on.
Even if you are not familiar with this gun, you certainly have heard of its successors, the SIG MKMO and the Király 39M.

The MK1930 is the first genuinely SIG designed submachine gun by the combined effort of Jakob Gaetzi and Gotthard End. Unlike later guns the MK1930 was only offered in 9mm parabellum (9x19) which was commercially the most sought after submachine gun calibre of its time. The design already features the unique 40 rounds foldable magazine, but here the magazine is folded towards the trigger rather than the barrel as on the Király or MKMO.
Since Pál Király did not work for SIG yet, the fruits of his unparalleled talents, the Király delayed blowback action was also not a feature yet and the MK1930 operates on a simple blowback action. The MK1930 does not have a fire selector and is only capable of full-auto fire, naturally like almost all submachine guns, it operates with an open bolt.

1930 Model 2


Statistics
Caliber: 9mm Parabellum
Magazine capacity: 40 rounds
Rate of fire: unknown, presumably similar to the SIG MKMO (850 rpm)
Initial muzzle velocity: 415 m/s (estimated)
Weight unloaded: 4650g
Weight fully loaded: 5450g (estimated)
Overall length: 950mm
Barrel length: 250mm
Lowest sight setting: 100m
Highest sight setting: 1000m
Safety: Lever to the left of the action group


There are no production figures available, only a few dozen of Mk1930s may have been produced which is why they are so incredibly rare nowadays.

The only nation to adopt this gun was Japan’s inner Mongolian puppetstate, Mengjiang.
How this submachine gun ended up with the “elite” body guards remains a mystery, neither the MK1930 or its later variants were ever used by any other faction in China. Its calibre -9mm parabellum- is also most unusual since China at time was dominated by the 7.63x25 Mauser, preferred for its high muzzle velocity.
My personal theory is that these guns were purchased by a Mongolian prince between 1931-32 to be used by his body guards (MK1930 is a very elegant gun after all) and not necessarily for direct combat purposes.

SIG MKMO 1930


In-game
Since Mengjiang was the only user, the submachine gun should be added for Japan.
Adding Mengjiang itself as a subfaction is out of the question due to its heavily controversial and political nature.

The SIG MK1930 could be Japan’s first SMG in 9mm parabellum, so it would unique for Japan, though it would not be a groundbreaking new gun since its stats are to be very similar to that of the Király 39M but with less damage (7.4 or 7.5 damage) and bit more dispersion with the upside of having a high (850 rpm) fire rate with incredibly low recoil.

Sources:
Vickers Guide – SIG Sauer Vol.1

image

Bewaffnung und Ausrüstung

Bewaffnung und Ausrüstung der Schweizer Armee seit 1817, Band 13, Automatenwaffen, Maschinenpistolen Selbstladegewehre (primary source and name was too long to fit it)
image

Rays of the rising sun volume 1 - japans asian allies 1931-45 china and manchukuo

Do you agree with adding the SIG MK1930 Japanese faction as a submachine gun?
  • Yes
  • No
0 voters
How would you like to see the MK1930 added?
  • Tech Tree weapon
  • Premium/Event squad
  • Standalone event weapon
  • Battle Pass weapon
0 voters

Thank you for your time and attention!

7 Likes

I’m a little skeptical of the rate of fire being high, due to the overall length of bolt travel being seemingly long. However, if it has a lightweight bolt or heavy spring to compensate, I think it would be fine giving it a similar RoF to the SIG MKMO and MKMS.

Regardless of what the rate of fire ends up being, Japan can always use more SMG options! Nice work on your research!

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I forgot to add my propaganda poster since now I’m running forum propaganda campaign the Emperor approves this topic ! Feel free to use my propaganda posters and spread them on the forum.

I would love a Mengjiang event/premium squad with unique cosmetics :

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A normal day in Ulan-Ude.

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Indeed the fire rate could very well be different.
Im guessing that the fire should be similar to its closest relative (SIG MKMS), but there are no records of the fire rate. This could be a good excuse for the developers to play around with the fire rate.

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Монголы, УРАГШАААААААААА!

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Spoiler

Generic English text with a message deletion protection effect.

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The Real Clash of Egos xD

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The Russian Civil War arguably gave us the greatest number of charismatic historical figures from Russia.

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Although the real Trotsky is obviously not as charismatic as the actor Konstantin Khabensky.

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With all due respect, I don’t mind a little fooling around in the comment section, however I would appreciate a little less memes and no politics, so the topic remains professional.

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All right, so be it.

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ok, last one

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sry :dromedary_camel:

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Japan never purchased the SIG Model 1930 shown in your picture.
Why do you want to give this weapon to Japan if they never even bought it? I could just as well say that it might belong to Germany.

Shipments to the Republic of China (Kuomintang): Chiang Kai-shek’s government actively purchased European weaponry to modernize its army in the face of the Japanese threat. Among other things, elite Swiss SIG MKMO/MKMS submachine guns were imported into China.
You might be mistaken you must have made a mistake regarding the model the ones present in China numbered literally anywhere from just a few units to a couple of dozen at most.
Снимок экрана 2026-09-12 181620

Though you are correct that Japan itself did not use the MK1930, however Mengjiang, which was little more than a Japanese puppet state did adopt the MK1930.
proof
From the book - Rays of the rising sun volume 1 - japans asian allies 1931-45 china and manchukuo

nope, there are no records of anyone else buying this gun.

opposite actually, I have no knowledge or sources that would indicate that the Republic of China had purchased SIG MK1930 or SIG MKMO.
You are probably confusing SIG M1920 with the MK1930. The only relation they have is that SIG designed both of them.
Besides, the two most common pistol rounds in China at the time were the 7.63x25 Mauser and the 7.65x21 parabellum. Why would the Nationalist government order a bunch of very expensive guns that they dont have the logistics for?

SIG M1920 order
IMG_20260912_173825
from B. Shih´s book: China’s Small Arms of The 2nd Sino-Japanese War (1937-1945)

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Mongol1


They will have a lot of options for customization.

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You could also cite Osprey Publishing’s Chinese Civil War Armies 1911–49 as a source—that’s where that image is from.


The 9mm Parabellum cartridge was indeed used in China; in 1938 alone, 105,500 of these rounds were sold through Hong Kong. They were used in submachine guns such as the Suomi M31, Vollmer, Thompson, etc.

The source seems solid enough, yet every now and then you hit a bizarre claim that makes you question everything else in the book. Still, one can hardly expect much better when it comes to pro-Japanese Chinese puppet regimes.

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  1. This is Asanchik!!!
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Gaijin should just add more weapons like this and not Copy Pasta and as a cherry on top it’s a Swiss weapon i am always happy to them in the suggestions

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Noted, thanks

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