PAM submachine gun

PAM submachine gun
A PAM-1 located at the Museo de Armas, Buenos Aires, Argentina.
TypeSubmachine gun
Place of originArgentina
Service history
In service1955-90s
WarsFalklands War
Production history
Designed1954
Manufacturer Fábrica Militar de Armas Portátiles
Developed fromM3 submachine gun
Produced1955-1972
No. built47,000
Specifications
Mass7.27 pounds (3.30 kg)
Length725 millimetres (28.5 in)
Barrel length200 millimetres (7.9 in)

Cartridge9×19mm
Rate of fire450 rounds/min
Feed systemDetachable double-feed box magazine
SightsRear flip-type sight with 50m and 100m settings

The Pistola Ametralladora (English: "machine gun" or "machine pistol"), often referred to as the PAM submachine gun, was a series of two Argentine submachine guns (the PAM-1 and PAM-2) that were licensed variants of the American M3A1 'Grease Gun'. The main difference between the PAM series and the M3A1 was that the PAM was chambered in 9×19mm Parabellum instead of the M3's .45 ACP. The PAM-1 began production in 1955 and remained in service with the Argentine Armed Forces through the Falklands War and the 90s before being mostly removed from service and sold on the civilian market as a semi-automatic conversion. The PAM-2 was an improved version of the PAM-1 that mostly addressed the inadequate safety originating from the original M3.