Armaguerra OG-43

Lore & Background

The OG-43 was designed by Giovanni Oliani at the Società Anonima Revelli Manifattura Armiguerra factory in Cremona. It was part of a family of weapons produced under emergency measures during the time of the Italian Social Republic, which also included the TZ-45, FNAB-43, and Isotta Fraschini. The Ministry of War of the RSI approved construction of the OG-43 and its subsequent version, the OG-44, but production was never initiated as events unfolded.

The weapon featured a modern design with a stamped sheet metal receiver and a magazine that served as the grip. The L-shaped bolt and recoil spring were housed in a cylinder above the barrel to reduce muzzle climb. The reciprocating cocking handle was located in the forward section of the bolt housing. It fired from an open bolt in both automatic and semi-automatic modes. Initially equipped with a forward-folding metal stock, later production runs used simpler wooden fixed stocks.

The OG-44 version adopted more traditional lines, with a wooden stock hinged to the pistol grip positioned behind the trigger and magazine well. It was slightly heavier than the OG-43 and had a total length of 787 mm.

Reader's Guide

The Armaguerra OG-43 represents an attempt to produce a modern, easily manufactured submachine gun under the constrained conditions of the Italian Social Republic. Its design, with a stamped receiver and magazine grip, was advanced for its time and aimed at simplifying production. The weapon's short-recoil blowback operation and open bolt firing mechanism were typical of the period, but the placement of the bolt and spring above the barrel was an innovative feature to control muzzle rise. The OG-43's use of Beretta MAB 38 magazines allowed compatibility with existing ordnance. Despite the Ministry of War's approval, the OG-43 and its OG-44 variant were never produced in significant numbers, as the collapse of the Republic of Salo halted further development. The weapon remains a footnote in submachine gun history, illustrating the emergency design efforts of the late World War II era in Italy.