The Probert Encyclopaedia of Warfare

INGRAM MODEL 6

The Ingram Model 6 was an American sub-machine-gun made for the US police force, and also supplied to Cuba and Peru and manufactured under licence in Peru. The Model 6 was made from 1949 to 1952 in the .45 ACP calibre and took a 30 round magazine. It had a rate of fire of 600 rounds per minute.
Research Ingram Model 6