Firearms / Sub machine guns / FMBP-48

FMBP-48

General Facts

  • TYPE
    Sub machine gun

  • ORIGIN
    Portugal

  • NICKNAMES
    FBP M1948 (alternative designation)
    m/948 (Portuguese designation for FMBP-48)
    m/963 (Portuguese designation for FMBP-63)
    m/976 (Portuguese designation for FMBP-76)

  • DESIGNED
    1940 - 1948

  • DESIGNER
    Gonçalves Cardoso

  • PRODUCTION
    1948 - 1955 (FMBP-48)
    1961 - 1980's (later models)

  • PRODUCERS
    Portugal - FBP

  • QUANTITY
    Unknown

  • UNIT COST
    Unknown

  • CHARACTERISTICS
    Limited production costs
    High reliability
    Heavy and bulky weapon
    Poor sights and ergonomics

Introduction

The FMBP-48 is an early Cold War era sub machine gun of Portuguese origin. It is named after the year of introduction and the factory Fabrica Militar de Braco de Prata, also known as FBP. The original design was patterned after the MP40. Due to World War 2 the production was delayed and after the war several principles of the M3 Grease Gun were implemented. Overall the FMBP-48 was a cheap and well perfoming weapon.

Design

The design of the FMBP-48 is based on the German MP40. The same same bolt, telescoping spring and magazines are used. The stamped receiver and retractable metal wire stock are patterned after the M3 Grease Gun. Most FMBP-48 are fitted with a barrel lug to allow the standard Mauser bayonet to be fitted. Over time the design was upgraded and resulted in the FMBP-63 and FMBP-76.

Firepower

The FMBP-48 fires the 9x19mm round from 32 round MP40 magazines. The cyclic rate of fire is 500 rpm. The FMBP-48 fires fully automatic only, later models are select-fire. The maximum effective range is quoted as 200 meters.

Users

The main user of the FMBP-48 and its variants was Portugal. The FMBP-48 was actively used during conflicts in the former Portuguese colonies. The FMBP-48 remained in use with many of the former Portuguese colonies.

Variants

FMBP-48

FMBP-48: Portuguese sub machine gun that fires the 9x19mm round. It features many elements of the German MP40 and US M3 Grease Gun.
FMBP-63: Improved FMBP-48 introduced in 1961 and adopted in 1963. It is similar to the FMBP-48, but has a fire selector and the ability for semi-automatic fire. The FMBP-63 was never produced in large quantities.

TypeSub machine gun
Caliber9x19mm Parabellum
Magazine32 rounds
OperationBlowback operated
Fire selector0-F
Rate of fire500 rpm
Barrel length249 mm
Rifling6 grooves, right hand twist
Muzzle velocity381 m/s
StockRetractable
Length813 mm / 635 mm
Width?
Height?
Weight3.75 kg unloaded, 4.43 kg loaded
SightsIron sights
Remarks-
TypeSub machine gun
Caliber9x19mm Parabellum
Magazine32 rounds
OperationBlowback operated
Fire selector0-1-F
Rate of fire500 rpm
Barrel length249 mm
Rifling6 grooves, right hand twist
Muzzle velocity381 m/s
StockRetractable
Length813 mm / 635 mm
Width?
Height?
Weight3.75 kg unloaded, 4.43 kg loaded
SightsIron sights
Remarks-

FMBP-76

FMBP-76: Much improved model of the FMBP-63. It features a grip safety, improved sights and a barrel shroud. Even with these additions the FMBP-76 is lighter than the previous model. The rate of fire has been increased from 500 to 600 rpm. The FMBP-76 replaced many older models in Portuguese service but it is unknown if all were replaced.

TypeSub machine gun
Caliber9x19mm Parabellum
Magazine32, 36 rounds
OperationBlowback operated
Fire selector0-1-F
Rate of fire600 rpm
Barrel length250 mm
Rifling6 grooves, right hand twist
Muzzle velocity380 m/s
StockRetractable
Length850 mm / 657 mm
Width?
Height?
Weight3.12 kg unloaded
SightsIron sights
Remarks-

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