The original version of the submachine gun (the FBP m/948) only allowed for fully automatic fire. An upgraded version ( designated FBP m/963 ) introduced in 1961 also allowed for semi-automatic fire.

The M/948 sub-machine gun or simply "FBP" (named after the factory it was manufactured by) was an intriguing example of sub-machine gun development in an era that would soon become dominated by high-caliber battle rifles.

FBP is a 9 mm submachine gun originally developed from a design first conceived in 1940 by Gonçalves Cardoso, an officer of artillery in the Portuguese Army. The onset of World War II halted development of the weapon, which was further modified and put into production in 1948.

The Portuguese FBP M948 submachine-gun was designed in the late 1940s by Major Francisco Gonçalves Cardoso, a Portuguese artillery officer. Cardoso amalgamated what he perceived to be the best features of existing submachine-gun designs - …

FBP M/948 SMG Parts Kit w/ Original Barrel & Bayonet Lug, Issue Bayonet, Collapsible Wire Stock, Type 2 Demill, 9x19 NATO *Good*

FBP m/948 submachine gun is a simple blowback weapon that fires from open bolt, in full automatic mode only. The bolt and especially return spring and its external telescoping guide are patterned after the German MP40 submachine gun, although the …

Jul 11, 2017 · Page details technical specifications, development, and operational history of the FBP SMG (Fabrica de Braco de Prata) Submachine Gun (SMG) including pictures.

The FBP/948 was the Portuguese military’s first attempt at developing a domestically designed and manufactured sub-machine gun. Its design was finalized immediately after World War Two, with many of the parts and mechanisms being influenced by other contemporary sub-guns.