The BFW M.19, sometimes known as the Messerschmitt M 19 was the first in a line of German low-wing single-engine sports planes designed by Willy Messerschmitt while he worked for Bayerische Flugzeugwerke (BFW).
The M.19 was developed to compete in the Sachsenflug competition for single seat lightplanes, to requirements set down by the Deutsche Versuchsanstalt für Luftfahrt (DVL). It was Messerschmitt's first low-wing cantilevermonoplane, though the fuselage and empennage were clearly related to that of the high-wing two-seat M.17 of 1925. This fuselage had five main longitudinal members, four defining the lower rectangular part and a raised, central dorsal member that made the upper cross-section triangular. These members tapered strongly together towards the tail unit, where the fuselage was very slim. The rudder and fin assembly were noticeable for being extremely rectangular, higher than wide and dominated by the rudder; the fin chord was very narrow and amounted to little more than a streamlined rudder post. It had a single-axle tailskid undercarriage.