The MPA submachine gun was the result of a project of the year 1977 carried out by it manufactures Sunday Matheu to manufacture a submachine gun of dimensions reduced. It had a tube of 100 mm that next to the handle in angle with respect to the axis of the weapon, had as an objective to reduce the forces of backward movement in the point of subjection. It could charge dockhands 18, 25 and 40 cartridges. The Country, was a development of an official of the FAA taking as base to the Ingram Mac 10. It included the possibility to mount a bayonet, a silencer and a special harness to mount it under the arm.