F.F. machine carbine

Blueprints of the 'F.F. machine carbine' were submitted to the Ordnance Board in early 1943. This gun, which was probably never made in a physical prototype, had several interesting features, including a pawl feed, a quick-change barrel, an automatically-ejecting magazine, and a pressure-sensitive trigger which gave semi-auto shots when half-pulled and automatic fire when fully depressed. The plans were passed on to the Armament Design Department in March 1943 and the principles were examined by the Belgian section. The associated report, written up by Dieudonné Saive on the 31st of March, criticized many aspects of the design as impractical and undesirable. Saive concluded that the F.F. did not exhibit any advantages over existing machine carbines, and no further development was undertaken on this design.