Sosso


Sosso pistol (image courtesy J.D.Julia auction house, USA)

 


Sosso pistol with shoulder stock/holster (image courtesy J.D.Julia auction house, USA)

 


Patent diagram for Sosso magazine system

 

Trigger type

Single action

Caliber

9×19 Luger / Parabellum

Weight empty, g

1510

Length, mm

220

Barrel length, mm

150

Capacity, rounds

21

 

The Sosso pistol was designed between 1933 and 1939 by Giulio Sosso, an Italian gun designer. After several improvements, it was produced in very small numbers by F.N.A. Brescia factory in 1941-42. Apparently, two slightly different models were produced, one with lanyard ring and slotted frame for detachable shoulder stock / holster, and another without these features. All in all, probably only around 100 or so of these pistols were made, as Sosso handgun turned to be very heavy, bulky and expensive to make, despite its unusually large magazine capacity.

 

Sosso pistol used unusual locking system utilizing short-recoiling barrel and vertically sliding pin; Single action trigger system featured exposed hammer and manual safety on the frame. Most unusual and unique feature of the Sosso pistol was its patented “endless conveyor” type magazine. Instad of the usual “box with spring and follower”, Sosso magazine contained endless belt or conveyor with 21 slots for individual cartridges, plus two spindles 9at the top and at the bottom) and associated framework. The conveyor was operated by the cycling slide via ratchet-type system that advanced cartridge belt one step during each rearward movement of the slide. Further features of the military-type Sosso pistol include adjustable sight (marked, rather optimistically, to 200 meters), and a detachable shoulder stock-holster.

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