The sole example of the M-5, built while he was a student in France by Caudron, was a low wing cabin tourer or military liaison aircraft.
Antônio Guedes Muniz was a pioneer of the Brazilian aviation industry but he produced his first designs while at the French Ecole Supérieure de Aéronautique.
Several studies remained unbuilt before he had the M-5, a two- or three-seat cantilever low wing cabin tourer, built by the Caudron company.
Each outer panel was built around a spruce box spar and the wing surface ahead of it was plywood, forming a torsion resisting D-box.
The engine was a water-cooled, six cylinder Hispano-Suiza 6Pa with its fuel tanks between the wing spar of the central section, within the lower fuselage.