The FBP submachine gun is a series of submachine guns primarily manufactured in Brazil by Fábrica Brasileira de Armas (FBP). Developed in the post-World War II era, it became a standard issue weapon for Brazilian armed forces and police units for several decades, known for its robust construction and reliability.
History and Development Following World War II, many nations sought to establish or expand their domestic arms manufacturing capabilities. In Brazil, Fábrica Brasileira de Armas emerged as a significant producer. The FBP submachine gun's design was heavily influenced by the German MP40 submachine gun, a highly successful and mass-produced weapon from the war. This influence is evident in its overall appearance, operating mechanism, and construction methods.
The initial model, often designated as the FBP M/948, was introduced around 1948. It aimed to provide the Brazilian military and law enforcement agencies with a modern, domestically produced submachine gun. Later, an updated version, the FBP M/975, was introduced, incorporating minor refinements, though the core design remained largely consistent.
Design and Features The FBP submachine gun is a straightforward, blowback-operated firearm that fires from an open bolt. This mechanism, common in many early submachine guns, simplifies design and manufacturing, contributing to its reliability.
- Caliber: It is chambered in 9x19mm Parabellum, a widely adopted pistol cartridge at the time, offering good performance and widespread availability.
- Construction: The weapon largely utilized stamped steel components, a manufacturing technique that reduced production costs and time, mirroring the approach taken with the MP40.
- Stock: A distinctive feature is its retractable wire stock, similar to that found on the MP40, which allowed for a more compact profile when retracted, making it suitable for close-quarters combat or vehicle crews.
- Magazine: It typically used a detachable box magazine with a capacity of 30 rounds.
- Safety: The safety mechanism often involved a notch in the cocking handle slot, which could lock the bolt in either the forward or rearward position, preventing accidental discharge.
- Fire Selector: The FBP submachine gun was generally capable of fully automatic fire only, lacking a semi-automatic fire mode.
Variants The primary variants are distinguished by their production year and minor design tweaks:
- FBP M/948: The initial production model, closely mirroring its MP40 inspiration.
- FBP M/975: A later iteration that introduced minor manufacturing improvements or ergonomic adjustments, but retained the fundamental design and operating characteristics.
Service The FBP submachine gun saw extensive service with the Brazilian Armed Forces, including the Army, Navy, and Air Force, as well as various state police forces throughout Brazil. It was a reliable and effective weapon for its intended role during the mid-to-late 20th century, gradually being phased out as more modern submachine gun designs and assault rifles became available.