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Submachine guns - Introduction
Argentina
FMK-3
Australia
Owen
F1
Austria
Steyr-Solothurn MP.34
Steyr MPi 69
Steyr TMP
Steyr AUG para
Belgium
Vigneron M2
FN P90
Bulgaria
Shipka
Chile
FAMAE S.A.F.
China
Type 64
Type 79
Type 85
Chang Feng
Type 05
Croatia
Agram2000
Czech republic
Skorpion vz.61
Sa.23
Denmark
Madsen m/50
Finland
Suomi M/31
Tikkakoski M/44
Jati-matic
France
MAS-38
MAT-49
Hotchkiss "Universal"
MGD PM-9
Germany
MP.18,I Schmeisser
MP.28,II Schmeisser
MP.35 Bergmann
EMP.35 Erma
MP.38 MP.40
MP.41 Schmeisser
Walther MPL & MPK
HK MP5
HK MP5K
HK UMP
HK MP7 PDW
Israel
UZI / MiniUzi / MicroUzi
Italy
Beretta M1938
Beretta M12
Franchi LF-57
Spectre M4
Japan
Minebea M-9 new
Poland
PM-63
PM-84
Russia / USSR
PPD-40
PPSh-41
PPS-43
PP-19 Bizon
PP-19-01 Vityaz
PP-90
PP-91 Kedr / Klin
PP-93
PP-90M1
PP-2000
AEK-919K Kashtan
OTs-02 Kiparis
SR-3 Veresk
South Africa
BXP
South Korea
Daewoo K7
Spain
Star Z-62 Z-70B
Star Z-84
Sweden
Carl Gustaf M/45
CBJ-MS PDW
Switzerland
Steyr-Solothurn S1-100
B+T MP 9
Ukraine
Elf
Goblin
TASCO 7ET9 7ET10
UK
Sten
Lanchester Mk.1
MCEM-2
Sterling L2 L34
USA
Thompson
Reising M50 M55
M3 and M3A1
UD M42
Ingram M6
Ingram MAC M10 and M11
Colt mod.635
American-180
Ares FMG
Smith&Wesson M76
Ruger MP9
Calico SMG
Kriss Super V™
Yugoslavia (ex)
M49
M56
MGV-176

all texts and some pictures
copyright © 1999-2008
by Max R. Popenker
and can not be used without author's permission

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Steyr - Solothurn S1-100 / MP-34 submachine gun (Switzerland / Austria)


Steyr MP-34 submachine gun, left side


Steyr MP-34 submachine gun, right side


Steyr MP-34 partially disassembled


Drawing from original patent, covering S1-100 integral magazine loading device

Caliber 9x19mm Luger / Parabellum, 9x23 Steyr, 9x25 Mauser Export
Weight 4,25 kg empty
Length 850 mm
Barrel length 200 mm
Rate of fire 400-500 rounds per minute
Magazine capacity 32 rounds
Effective range 150-200 meters

The story of this weapon start in around 1919, when German arms-making company Rheinmetall produced a prototype submachine gun designated MP.19. This weapon was developed by Lous Stange to same specifications as Schmeisser's MP.18/I, but MP.19 came too late to see any action during WW1. After the end of WW1, Germany was severely limited in design and production of small arms by treaty of Versailles. When Hitler came into power, German military-oriented companies began to move the R&D outside of Germany to avoid treaty limitations. In 1929, Rheinmetall purchased the small Swiss-based company Wafenfabrik Solothurn, which was used to finalize some Rheinmetall small arms which were developed under secrecy in Germany. One of those weapons was an improved version of MP.19 submachine gun, which was announced by Waffenfabrik Solothurn under company index "S1-100". This was an excellent weapon, reliable, controllable and accurate, but Solothurn company lacked production capabilities. To make guns on industrial scale, Solothurn teamed with famous Austrian gun-making company Waffenfabrik Steyr, and formed trade company Steyr-Solothurn Waffen AG in Zurich, Switzerland. This company sold weapons designed by Rheinmetall and Solothurn and made by Steyr, and S1-100 submachine gun was among first products of this international conglomerated. In the 1930 Austrian police adopts the S1-100 as Steyr MP.30, chambered for standard Austrian 9x23 Steyr pistol cartridge. It was also exported to Chile, Bolivia, Uruguay and El Salvador; it also was sold in limited numbers to China, in 7,63x25 Mauser caliber. Portugal adopted the S1-100 in 7,65x22 Luger caliber in 1938, and in 1942 purchased more S1-100's from Steyr but this time in 9x19 Luger. For South American markets, Steyr produced version of S1-100 in .45ACP caliber; this version was distinguished by additional pistol grip under the forearm. Austrian army adopted the S1-100 as Steyr MP.34, chambered for powerful 9x25 Mauser ammunition. When Hitler's Germany occupied Austria in 1938, it quickly consumed most of Austrian MP.30's and MP.34's, and after rebarreling to 9x19 ammunition these weapons were issued to German troops as MP.34(ö). Production of Steyr-Solothurn submachine guns has ceased in around 1940, when, under German administration, it was replaced in production at Steyr by much simpler and less expensive MP-40 submachine gun of German design. It must be noted that S1-100 was one of the finest submachine guns made prior to WW2, and probably one of most expensive.

Steyr-Solothurn S1-100 submachine gun was blowback operated, selective-fired weapon which fired from open bolt. Unlike most other submachine guns, the return spring was located in the buttstock and was linked to bolt via long push-rod, pivotally attached to the rear of the bolt. The basic action of the gun was accessible through the top cover, which was hinged at the front and opened up and forward to expose bolt and trigger unit below it. The fire mode selector was made in the form of a sliding switch, located at the left side of the stock. Early guns had Schmeisser-style bolt-locking safety in the form of hook-shaped cut which was used to engage the bolt handle when bolt was cocked. Later on, additional manual safety was added to the top cover, in front of the rear sight. this safety locked bolt either in cocked or closed position. The feed was from left side, with magazine housing slightly canted forward for more positive feeding Ejection was to the right. The magazine housing had an unusual magazine filler device, with slots for magazine at the bottom and for stripper clip - at the top. removed magazine was inserted into this device from the bottom, and then shooter placed stripper clips into the top of device and pushed cartridges down into magazine. Four standard 8-round clips were required to fill the magazine.
All S1-100 guns were fitted with wooden stock with semi-pistol grip. Barrel was enclosed into perforated jacket, which had provisions for mounting a bayonet. Sights included hooded front and tangent type rear, marked from 100 to 500 meters. One most unusual accessory, which was briefly advertised for S1-100 during mid-1930s, was a compact machine-gun type tripod, which was to provide additional stability for weapon when firing from ground. It seems that this tripod was never made in quantity.

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