FBP/M948 smg Portugese
This weapon is a combination of features of the German MP40 and the American M3 "Grease Gun", and was designed by Major Cardoso of the Portugese Army. Extensive use was made of steel pressings, and the result was a reliable and inexpensive weapon. 9 mm Parabellum, 32 shot detachable box magazine, 500 rpm, weight 7.65 lbs.
Photos and Information from:
Larrys web-site / Lots of stuff here