The Gevarm D4 is presented as an economical alternative to the French MAT-49 submachine gun, developed in 1956. Key differences from the D3 model include a solid wooden stock. It operates via a simple open-bolt, blowback action and features a proprietary 32-round magazine in 9mm Parabellum. Despite a 1% malfunction rate in military testing, it saw adoption by French security forces.
This review details a rare .22LR conversion of the Berthier carbine, specifically manufactured by MAPF (Unique) for the French National Police (CRS) in the 1950s. The conversion utilized surplus Berthier carbines, adapting them for training and prison guard duties with a unique angled bore design to accommodate a rimfire firing pin and a 5-round magazine from the Unique X11 pistol. Approximately 800 units were produced, serving the police for 50 years until 2005.
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